Curriculum vitae for Takafumi Hayashi

CURRICULUM VITAE for Takafumi Hayashi

Last updated at April 26, 2024

Personal details
Name: Takafumi Hayashi, D.D.S., Ph.D.
Position: Professor and Chairman
Affiliation: Division of Oral and Maxillofacial Radiology, Niigata University Graduate School of Medical and Dental Sciences
Address: 2-5274 Gakkocho-dori, Chuo-ku, Niigata 951-8514 Japan
Phone: +81-25-227-2914
Fax: +81-25-227-0810
URL: http://www.dent.niigata-u.ac.jp/radiology/hayashi.html
Place of birth: Suwa, Nagano, Japan
Date of Birth: April, 1962
Nationality: Japanese

Research interests:
Diagnostic imaging of oral and maxillofacial region
Application of ultrasonography in dentistry
Intraoral ultrasonography of the tongue carcinoma
Development of clinical practice guidelines

Academic appointments:
2002.11.1- Professor and Chairman, Division of Oral and Maxillofacial Radiology, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Course for Oral Life Science
2000.4.1-2002.10.31 Associate professor, Division of Oral and Maxillofacial Radiology, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Course for Oral Life Science
1998.10.1-2000.3.31 Associate professor, Department of Oral and Maxillofacial Radiology, Niigata University School of Dentistry
1995.11.16-1998.9.30 Lecturer, Department of Oral and Maxillofacial Radiology, Niigata University School of Dentistry
1987.4.1-1995.11.15 Clinical instructor, Department of Oral and Maxillofacial Radiology, Niigata University School of Dentistry

2017.4.1-2019.3.31 Honorary Professor of the University of Hong Kong
2019.4.1-2021.3.31 Honorary Professor of the University of Hong Kong
2021.4.1-2023.3.31 Honorary Professor of the University of Hong Kong

Education:
1987 D.D.S. Niigata University School of Dentistry
1995 Ph.D. (D.D.Sc.) Niigata University School of Dentistry
Thesis: Axial CT findings of articular disc displacement in the temporomandibular joint

Professional societies:
Board Certified Consulting Specialist of the Japanese Society for Oral and Maxillofacial Radiology
Board Certified Specialist of the Japanese Society for Oral and Maxillofacial Radiology
Director, Japanese Society for Oral and Maxillofacial Radiology
Director, The Japanese Stomatological Society
Director, Japan Society of Oral Onchology
Council member, The Japanese Society of Medical Imaging
Member, International Association of Dento-Maxillo-Facial Radiology
Member, Japanese Society for temporomandibular joint
Member, The Japanese Society for Jaw Deformities
Member, Japanese Society of Oral and Maxillofacial Surgeons
Member, Japanese Cleft Palate Association
Member, Japan Radiological Society
Member, Japan Society for Head and Neck Cancer
Member, Japanese Society for Therapeutic Radiology and Oncology

Publications:
Journal articles (since 1990)
1. Nakamura M, Hayashi T, Fujiki M, Nakayama H, Sasaki F, Ito J. Present status of dental radiologic practice in university hospital -Questionnaire study-. Dental Radiology 1990;30(2):163-168 (in Japanese).
2. Nakayama H, Sasaki F, Hayashi T, Tsubota M, Nakamura M, Ito J. Bilateral hyperplasia of mandibular coronoid processes. Dental Radiology 1992;32(1):24-41 (in Japanese).
3. Nakamura M, Ashikagaya M, Sato M, Hayashi T, Nakayama H, Sasaki F, Ito J. Two cases of carcinoma of buccal mucosa treated with Au grains and Cs needles. Dental Radiology 1992;32(1):42-47 (in Japanese).
4. Nakamura M, Ashikagaya M, Sato M, Hayashi T, Nakayama H, Sasaki F, Ito J. Two cases of advanced tongue carcinoma treated by interstitial radiotherapy. Dental Radiology 1992;32(3):74-81 (in Japanese).
5. Nakamura M, Ashikagaya M, Sato M, Hayashi T, Nakayama H, Kobayashi F, Ito J. Results of interstitial radiotherapy for carcinoma of the buccal mucosa. Oral Radiology 1993;9(1):1-8.
6. Saito T, Hoshina Y, Nagamine T, Nakajima T, Suzuki M, Hayashi T. Simple bone cyst. A clinical and histopathological study of fifteen cases. Oral Surg Oral Med Oral Pathol 1992;74(4):487-491.
7. Hayashi T, Ito J, Nakayama H, Kobayashi F, Nakamura M, Komiya T, Suzuki M, Fukushima M, Takagi R, Ohashi Y. Squamous cell carcinoma probably arising in an incisive canal cyst: report of a case. Dental Radiology 1993;33(2):74-80 (in Japanese).
8. Masuda M, Ohshima K, Noda T, Hayashi T. Supernumerary tubercle on the surface of maxillary left central incisor: A case report. Niigata Dent J 1993;23(1):37-43 (in Japanese).
9. Hayashi T, Ito J, Kato T, Nakayama H, Nakamura M, Shingaki S, Hoshina H. 10MHz high-resolution ultrasonography of cervical lymph node metastasis in oral cancer. J Jpn Soc Oral Tumor 1994;6(2):55-65 (in Japanese).
10. Hamamoto Y, Nakajima T, Hayashi T. Analysis by computed tomography of bone changes in the mandibular head and mandibular fossa in relation to clinical findings in patients with temporomandibular joint (TMJ) disorders. JJOMS 1994;40(12):1207-1212 (in Japanese).
11. Hayashi T. Axial CT findings of articular disc displacement in the temporomandibular joint. Dental Radiology 1995;35(2):55-69 (in Japanese).
12. Hayashi T, Ito J, Matsushita T, Kobayashi F, Nomura S. 10MHz high-resolution ultrasonography in the diagnosis of internal derangement of the temporomandibular joint. J Jpn Soc TMJ 1995;7(2):29-39 (in Japanese).
13. Shingaki S, Suzuki I, Nakajima T, Hayashi T, Nakayama H, Nakamura M. Computed tomographic evaluation of lymph node metastasis in head and neck carcinomas. J Cranio Maxillo-Facial Surg 1995;23:233-237.
14. Matsushita T, Hayashi T, Ito J. Morphologic bony changes in temporomandibular joints with closed lock -evaluation with axial x-ray computed tomography-. Dental Radiology 1995;35(3):150-157 (in Japanese).
15. Kato K, Kohno S, Iwakata S, Sakurai N, Kasai M, Hirano H, Ito J, Hayashi T, Nakayama H, Takeuchi Y, Ito T, Sano K. A study on x-ray exposure with a new digital fluorographic system (X-ray TV system) during examination of stomatognathic functions. Niigata Dent J 1995;25(1):27-34 (in Japanese).
16. Matsushita T, Hayashi T, Kobayashi F, Ito J. X-ray CT findings in temporomandibular joint in patients with mandibular asymmetry -Relationship between internal derangement and jaw deformity-. Niigata Dent J 1995;25(2):155-160 (in Japanese).
17. Nakayama H, Hayashi T, Obinata K, Hinoki A, Fujisawa Y, Kato T, Masuko N, Ashikagaya M, Kobayashi F, Nakajima S, Ito J, Irie T, Saku T, Hamamoto Y, Nakajima T, Nakamura M. A simple bone cyst at the site of the previously operated odontoma associated with a fibro-osseous lesion in the mandible. Dental Radiology 1995;35(2):70-78 (in Japanese).
18. Ashikagaya M, Fujisawa Y, Kato T, Hayashi T, Nakayama H, Nakamura M. Dento-oral care in patients with head and neck radiation therapy -Questionnaire to institutions provided with radiotherapy units-. Head and Neck Cancer 1995;21(1)198-202 (in Japanese).
19. Hayashi T, Ito J, Yamakawa T, Koyama J, Matsushita T, Kobayashi F, Michimi N. Magnetic resonance imaging on the internal derangement of the temporomandibular joint. Niigata Dent J 1996;26(1):1-12 (in Japanese).
20. Matsushita T, Takagi R, Hayashi T, Ito J. Imaging analysis of the temporomandibular joint after intraoral vertical ramus osteotomy for treatment of patients with reducible disc displacement. Niigata Dent J 1996;26(1):13-20.
21. Hamamoto Y, Okada T, Nakajima T, Hayashi T, Ito J. The relationship of the shortest distance from the mandibular head to the mandibular fossa and osteoarthrosis. Asian J Oral Maxillofac Surg 1996;8:123-127.
22. Kato T, Hayashi T, Munakata R, Shingaki S. Relationship of the size of metastatic lymph nodes with histological response in oral cancer after preoperative chemotherapy -Ultrasonographic evaluation-. JJOMS 1996;42(10): 992-998 (in Japanese).
23. Kobayashi F, Matsushita T, Hayashi T, Ito J. A morphological study on the temporomandibular joint using X-ray computed tomography: relation to anterior disk displacement. Dental Radiology 1996;36(2):73-80 (in Japanese).
24. Hayashi T, Ito J, Ueno T, Koyama J, Kato T, Munakata R, Hoshina Y, Nomura T. Early detection of metastatic cervical lymphadenopathy in a patient with tongue carcinoma using programmed ultrasonography. Dental Radiology 1996;36(2):100-101 (in Japanese).
25. Kato T, Hayashi T, Nakayama H, Nakajima S, Ito J, Munakata R, Nakamura M. Sonographic and pathological correlation of metastatic cervical lymph nodes in patients with oral cancer with special reference to keratinization of primary lesions. Dental Radiology 1996;36(3):167-175 (in Japanese).
26. Kato T, Hayashi T, Munakata R. Evaluation of ultrasonography with intraoral scanner in T1 and T2 carcinoma of the tongue. JJOMS 1997;43(11):809-813 (in Japanese).
27. Hayashi T, Ito J, Koyama J. Gas in the temporomandibular joint: computed tomography findings. Report of 3 cases. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1998;86(6):751-754.
28. Hayashi T. Detection of subclinical metastasis with repeated ultrasonographic examination of cervical lymph nodes. J Jpn Soc Oral Tumor 1998;10(4):282-287 (in Japanese).
29. Chuujoh T, Takada M, Kohno M, Nakajima T, Hayashi T, Suzuki M. Plunging ranula extending from the parapharyngeal space to the base of the skull: report of two cases. Niigata Dent J 1998;28(2):63-68 (in Japanese).
30. Hayashi T, Ito J, Kato T, Hinoki A, Taira S, Saku T: Intracortical hemangioma of the mandible. Dentomaxillofac Radiol 1999;28(2):127-129.
31. Hayashi T, Ito J, Koyama J, Hinoki A, Kobayashi F, Torikai Y, Hiruma Y. Detectability of anterior displacement of the articular disk in the temporomandibular joint on helical computed tomography: the value of open mouth position. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 1999;88(1):106-111.
32. Kobayashi T, Honma K, Izumi K, Hayashi T, Shingaki S, Nakajima T. Temporomandibular joint symptoms and disc displacement in patients with mandibular prognathism. Br J Oral Maxillofac Surg 1999;37(6):455-458.
33. Honma K, Kobayashi T, Nakajima T, Hayashi T. Computed tomographic evaluation of bone formation after secondary bone grafting of alveolar clefts. J Oral Maxillofac Surg 1999;57:1209-1213.
34. Yamada K, Hiruma Y, Hanada K, Hayashi T, Koyama J, Ito J. Condylar bony change and craniofacial morphology in orthodontic patients with temporomandibular disorders (TMD) symptoms.: a pilot study using helical computed tomography and magnetic resonance imaging. Clin Orthod Res 1999;2(3):133-142.
35. Kobayashi F, Ito J, Hayashi T. Evaluation of position and configuration of the temporomandibular joint disk in asymptomatic adult volunteers using MR image. J Jpn Soc TMJ 1999;11:13-17 (in Japanese).
36. Katsura K, Masuko N, Yamakawa T, Koyama J, Hinoki A, Kato T, Kobayashi F, Nakajima S, Hayashi T, Ito J. Osteoradionecrosis induced or exacerbated by dental infection. Report of a case. Niigata Dent J 1999;29(1):17-22 (in Japanese).
37. Ajima H, Kobayashi T, Inoue K, Takagi R, Hayashi T, Ito J, Oda Y, Saku T. Osteochondroma arising on the condylar head: a case report. Niigata Dent J 1999;29(1):29-32 (in Japanese).
38. Suzuki M, Nomura S, Iwakata S, Taguchi N, Kobayashi T, Kobayashi T, Yamada K, Hayashi T, Fukushima M, Kubota T, Ohshima K, Tanaka Y, Kohno S. Present condition and future considerations of team approach for TMD patients in our hospital -The second report-. Niigata Dent J 1999;29(2):129-137 (in Japanese).
39. Kodama Y, Takagi R, Hoshina H, Iida A, Fukuda J, Ito J, Hayashi T, Saku T. A case of neurilemmoma of the hard palate, suspected a malignant tumor. Niigata Dent J 1999;29(2):147-151 (in Japanese).
40. Hayashi T, Ito J, Taira S, Katsura K, Hinoki A, Kohno M. Measurement of the minimal diameter of non-metastatic jugulodigastric lymph nodes using ultrasonography. Dental Radiology 2000;40(1):33-37 (in Japanese).
41. Hayashi T, Ito J, Koyama J, Kobayashi F. The articular disc position relative to the mandibular condyle in patients with skeletal Class III malocclusion on MRI. Oral Radiology 2000;16(1):17-21.
42. Uy-Co ET, Yamada K, Hanada K, Hayashi T, Ito J. Condylar bony change and mandibular deviation in orthodontic patients -using helical CT and MRI. Clin Orthod Res 2000;3:132-143.
43. Hayashi T, Ito J, Koyama J, Kobayashi F. Sagittal MR findings of the temporomandibular joint in opened-mouth position in patients with articular pain. J Jpn Soc TMJ 2000;12(2):223-226 (in Japanese).
44. Katsura K, Masuko N, Sugita T, Hayashi T, Sakai K, Tsuchida E, Matsumoto Y, Sasamoto R. Oral hygiene care of patients with oral cancer during postoprative irradiation -an alleviating effect on acute radiation mucositis-. J Jpn Soc Ther Radiol Oncol 2000;12:229-235 (in Japanese).
45. Yamada K, Oguri Y, Hiruma Y, Hanada K, Sawada K, Kohno S, Hayashi T, Ito J. Influence of condylar bony change and articular disk displacement on mandibular tapping movement in patients with jaw deformity. J Jpn Soc TMJ 2000;12(1):88-97 (in Japanese).
46. Miyamoto T, Takagi R, Hoshina H, Hayashi T, Oda Y, Saku T. Myoepithelioma of the hard palate: report of a case and differential diagnosis from pleomorphic adenoma by post-contrast computed tomography. JJOMS 2000;46(10):590-592 (in Japanese).
47. Koyama J, Ito J, Hayashi T, Kobayashi F. A case of melanotic neuroectodermal tumor of infancy. Dental Radiology 2000;40(4):260-264 (in Japanese).
48. Terajima K, Nagasaki K, Koga Y, Omori G, Hayashi T. Anatomical femoral coordinate system. -Improvement of accuracy by CT data-. Journal of Japanese Society for Clinical Biomechanics 2000;21:497-502 (in Japanese).
49. Hayashi T, Ito J, Koyama J, Yamada K. The accuracy of sonography for evaluation of internal derangement of the temporomandibular joint in asymptomatic elementary school children: comparison with MR and CT. AJNR Am J Neuroradiol 2001;22(4):728-734.
50. Yamada K, Satou Y, Hanada K, Hayashi T, Ito J. A case of anterior open bite developing during adolescence. J Orthod 2001;28(1):19-24.
51. Torikai Y, Morita S, Hoshi T, Hiruma Y, Hanada K, Hayashi T. The positional relationship between the mandible and the hyoid bone in patients with mandibular protrusion. Jpn J Jaw Defrom 2001;11(1):1-10 (in Japanese).
52. Hinoki A, Kobayashi F, Ito J, Hayashi T, Saku T, Taira S, Imai N, Takagi R. Infantile fibromatosis of the mandible. Dental Radiology 2001;41(1):45-51 (in Japanese).
53. Yamada K, Hanada K, Hayashi T, Ito J. Condylar bony change, disk displacement, and signs and symptoms of TMJ disorders in orthognathic surgery patients. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001;91(5):603-610.
54. Morita S, Torikai Y, Ishii K, Wakamatsu K, Hanada K, Ono K, Iida A, Imai N, Takagi R, Kobayashi F, Hayashi T. Evaluation of secondary bone grafting using autogenous particulate cancellous bone and marrow-harvested from patients with two-stage palatoplasty combined with a Hotz plate. J Jpn Cleft Palate Assoc. 2001;26:114-124 (in Japanese).
55. Koyama J, Ito J, Hayashi T, Kobayashi F. Synovial chondromatosis in the temporomandibular joint complicated by displacement and calcification of the articular disk: report of two cases. AJNR Am J Neuroradiol 2001;22(6):1203-1206.
56. Katsura K, Ito J, Hayashi T, Taira S, Nakajima S. Cortical splitting of the mandible after irradiation -special reference to osteoradionecrosis- Dental Radiology 2001;41(2):101-108 (in Japanese).
57. Yamada K, Hanada K, Fukui T, Satou Y, Ochi K, Hayashi T, Ito J. Condylar bony change and self-reported parafunctional habits in prospective orthognathic surgery patients with temporomandibular disorders. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001;92(3):265-271.
58. Hayashi T, Ito J, Taira S, Katsura K. The relationship of primary tumor thickness in carcinoma of the tongue to subsequent lymph node metastasis. Dentomaxillofac Radiol 2001;30(5):242-245.
59. Hayashi T, Ito J, Tanaka R, Taira S, Koyama J, Katsura K, Masuko N, Kobayashi F. Three-dimensional volumetric visualization of subsequent cervical lymph node metastases in patients with tongue carcinoma using CT data; a diagnostic aid for repeated follow-up ultrasonography. Dental Radiology 2001;41(4):240-244 (in Japanese).
60. Hayashi T, Shingaki S, Hoshina H. The relationship between intraoral sonographic findings and subsequent lymph node metastasis in patients with T1 and T2 tongue carcinoma. J Jpn Soc Oral Tumor 2001;13(3):75-79 (in Japanese).
61. Koyama J, Ito J, Hayashi T. Periosteal osteosarcoma of the mandible. Dentomaxillofac Radiol 2002;31(1):63-64.
62. Hayashi T, Ito J, Katsura K, Honma K, Shingaki S, Ikarashi T, Saku T. Malignant melanoma of mandibular gingiva; the usefulness of fat-saturated MRI. Dentomaxillofac Radiol 2002;31(2):151-153.
63. Lai W, Yamada K, Hanada K, Ali IM, Takagi R, Kobayashi T, Hayashi T. Post-operative mandibular stability after orthognathic surgery in patients with mandibular protrusion and mandibular deviation. Int J Adult Orthodon Orthognath Surg 2002;17(1):13-22.
64. Kobayashi T, Kanoh H, Honma K, Shingaki S, Yamada K, Saito I, Hayashi T, Saito C. Temporomandibular joint symtoms and mandibular stability after orthognathic surgery in patients with mandibular prognathism. Jpn J Jaw Deform 2002;12(1):9-14 (in Japanese).
65. Hayashi T, Ito J, Taira S, Katsura K. The usefulness of follow-up sonography in the detection of subsequent cervical lymph node metastases in patients with stage I / II tongue carcinoma. Oral Radiology 2002;18(1):1-7.
66. Hayashi T, Ito J, Tanaka R, Koyama J, Kobayashi F. The prevalence of erosive osseous changes of the articular eminence in the temporomandibular joint in patients with mandibular prognathism without internal derangement; MR and helical CT findings. Oral Radiology 2002;18(1):9-13.
67. Hayashi T, Ito J, Taira S, Katsura K, Shingaki S, Hoshina H. The clinical significance of follow-up sonography in the detection of cervical lymph node metastases in patients with stage I or II squamous cell carcinoma of the tongue. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2003;96(1):112-117.
68. Fan S, Ito J, Hayashi T. The relationship between articular pain and MR findings in patients with a unilateral non-reducible anterior disk displacement in the temporomandibular joint. Niigata Dent J 2002;32(1):11-15 (in Japanese).
69. Tanaka R, Hayashi T. Relationship between mandibular asymmetry and articular disc position relative to the mandibular condyle -3D measurement using helical CT and MR imaging-. Jpn J Jaw Deform 2003;13(1)12-20 (in Japanese).
70. Hayashi T, Tanaka R, Taira S, Koyama J, Katsura K, Kobayashi F. Non-contrast-enhanced CT findings of high a
ttenuation within metastatic cervical lymph nodes in patients with stage I or II tongue carcinoma during a follow-up period. AJNR Am J Neuroradiol 2003;24(7):1330-1333.
71. Ikarashi T, Fujimori Y, Ohshiro K, Oda Y, Saito C, Koyama J, Hayashi T, Suzuki M, Saku T. Dentigerous cyst associated with a supernumerary malformed tooth: report of a case and a clinicopathologic review. Oral Med Pathol 2003;8(2):55-59.
72. Yamazaki M, Cheng J, Nomura T, Saito C, Hayashi T, Saku T. Maxillary odontogenic keratocyst with respiratory epithelium: a case report. J Oral Pathol Med 2003;32(8):496-498.
73. Kobayashi F, Ito J, Hayashi T, Maeda T. A study of volumetric visualization and quantitative evaluation of bone trabeculae in helical CT. Dentomaxillofac Radiol 2003;32(3):181-185.
74. Tsuruta A, Yamada K, Hanada K, Hosogai A, Tanaka R, Koyama J, Hayashi T. Thickness of the roof of the glenoid fossa and condylar bone change: a CT study. Dentomaxillofac Radiol 2003;32(4):217-221.
75. Yamada K, Saito I, Hanada K, Hayashi T. Observation of three cases of temporomandibular joint osteoarthritis and mandibular morphology during adolescence using helical CT. J Oral Rehabil 2004;31(4):298-305.
76. Yamada K, Tsuruta A, Hanada K, Hayashi T. Morphology of the articular eminence in temporomandibular joints and condylar bone change. J Oral Rehabil 2004;31(5):438-444.
77. Tsuruta A, Yamada K, Hanada K, Hosogai A, Kohno S, Koyama J, Hayashi T. The relationship between morphological changes of the condyle and condylar position in the glenoid fossa. Journal of Orofacial Pain 2004;18(2):148-155.
78. Tsuruta A, Yamada K, Hanada K, Koyama JI, Hayashi T, Hosogai A, Kohno S. Comparison of condylar positions at intercuspal and reference positions in patients with condylar bone change. J Oral Rehabil. 2004;31(7):640-646.
79. Hayashi T, Katsura K, Taira S, Shingaki S, Hoshina H. Fusiform-shaped nodule along the internal carotid artery demonstrated on the follow-up sonography within the dissected neck area in patients with oral cancer. Japanese Journal of Head and Neck Cancer 2004;30(4):630-634 (in Japanese).
80. Izumo T, Kirita T, Kusama M, Sato T, Shinohara S, Shintani S, Tanaka Y, Hayashi T, Miyazaki A, Yamane M. General rules for clinical and pathological studies on oral carcinomas: 1. carcinoma of the tongue (first ed.), a proposal from the working group 1, scientific committee, Japan Society for Oral Tumors. J Jpn Soc Oral Tumor 2005;17(1):13-85 (in Japanese).
81. Katsura K, Hayashi T. Non-neoplastic process after neck dissection demonstrated on enhanced CT in patients with head and neck cancer. Dentomaxillofac Radiol. 2005;34(5):297-303.
82. Yamada K, Hanada K, Hayashi T. Double contours and craniofacial morphology. Cranio. 2005;23(2):144-151.
83. Estomaguio GA, Yamada K, Ochi K, Hayashi T, Hanada K. Craniofacial morphology and inclination of the posterior slope of the articular eminence in female patients with and without condylar bone change. Cranio. 2005;23(4):1-7.
84. Tanaka R, Hayashi T, Takagi R, Maruyama S, Cheng J. Calcifying odontogenic cyst with aggressive regrowth repeated: A case report with CT and MR findings. Proceedings of the 5th Congress of the International College for Maxillo-Facial-Surgery. 2005;66-67.
85. Hayashi T, Tanaka R, Saito C, Takagi R. Clinical significance of sonography in evaluation of the course of the maxillary artery -comparison with contrast enhanced CT-. Jpn J Jaw Deform 2006;16:12-15 (in Japanese).
86. Ono K, Ohuchi A, Uoshima K, Hayashi T, Nishiyama H, Ajima H, Kobayashi T, Seo K, Saito I, Cheng J, Yamada Y, Maeda T. Introduction of problem-based learning into the undergraduate education at the Niigata University Faculty of Dentistry. J Jpn Dent Educ Assoc 2006;22(1):58-71 (in Japanese).
87. Wakamatsu T, Hanada K, Hayashi T, Saito I. Volume measurement of masseter muscle using volume rendering technic in jaw deformity patients with mandibular deviation. Niigata Dent J 2006;36(2):25-30 (in Japanese).
88. Maeda T, Ono K, Ohuchi A, Hayashi T, Saito I, Okiji T, Uoshima K. An evaluation of problem-based learning course at the Niigata University Faculty of Dentistry. Dentistry in Japan 2007;43:166-171.
89. Wakamatsu T, Yamaki M, Hanada K, Hayashi T, Saito I. Three-dimensional evaluation of morphological asymmetry of maxillofacial complex in patients showing mandibular prognathism with facial asymmetry. Jpn J Jaw Deform 2007;17(1):29-36 (in Japanese).
90. Tanaka R, Hayashi T. A proposal of a three-dimentional CT measurement method of maxillofacial structure. J Jpn Soc Bone Morphom 2007;17(2):7-14 (in Japanese).
91. Saito M, Sugawara Y, Sasano K, Sakamoto M, Shimeno Y, Hayashi T. Two cases of difficult-to-diagnose nasopalatine duct cyst. Japanese Journal of Oral Diagnosis/Oral Medicine 2007;20(1):108-113 (in Japanese).
92. Izumo T, Ozeki S, Okada N, Okabe S, Okazaki Y, Kirita T, Kusama M, Sato T, Shinohara S, Shintani S, Tanaka Y, Nakayama E, Hayashi T, Miyazaki A, Yamane M. General rules for clinical and pathological studies on oral carcinomas: 2. carcinoma of the lower gingiva (first ed.), a proposal from the working group 1, scientific committee, Japan Society for Oral Tumors. J Jpn Soc Oral Tumor 2007;19(2):37-124 (in Japanese).
93. Hayashi T, Nikkuni Y, Saito M, Tanaka R, Taira S, Koyama J, Katsura K, Nishiyama H. Imaging in the diagnosis of cervical lymph node metastases in patients with oral squamous cell carcinoma. Niigata Dent J 2007;37(2):173-186 (in Japanese).
94. Sakuma K, Ikarugi Y, Tanaka R, Hayashi T. Ultrasonography of periapical lesion: comparison with CT. Dental Radiology 2007;47(2):53-64 (in Japanese).
95. Koyama J, Nishiyama H, Hayashi T. Follow-up study of condylar bony changes using helical computed tomography in patients with temporomandibular disorder. Dentomaxillofac Radiol 2007;36(8):472-477.
96. Sawair FA, Cheng J, Hao N, Maruyama S, Hoshina H, Takagi R, Koyama J, Hayashi T, Saku T. Periosteal osteosarcoma of the jaw bones: a clinicopathological review. Oral Med Pathol 2007;12:3-10.
97. Izumo T, Ozeki S, Okada N, Okabe S, Okazaki Y, Kirita T, Kusama M, Sato T, Shinohara S, Shintani S, Tanaka Y, Nakayama E, Hayashi T, Miyazaki A, Yagishita H, Yamane M. General rules for clinical and pathological studies on oral carcinomas: 3. carcinomas of the buccal mucosa and the floor of the mouth (first ed.), a proposal from the working group 1, scientific committee, Japan Society for Oral Tumors. J Jpn Soc Oral Tumor 2008;20(2):25-117 (in Japanese).
98. Hayashi T. Imaging in the diagnosis of cervical lymph node metastases in patients with oral cancer: correlation between imaging findings and histopathologic results. Jpn J Oral maxillofac Surg 2008;54(6):361-367 (in Japanese).
99. Tanaka R, Hayashi T. Computed tomography findings of chronic osteomyelitis involving the mandible: correlation to histopathological findings. Dentomaxillofac Radiol 2008;37(2):94-103.
100. Katsura K, Sasai K, Sato K, Saito M, Hoshina H, Hayashi T. Relationship between oral health status and development of osteoradionecrosis of the mandible: a retrospective longitudinal study. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2008;105(6):731-738.
101. Ikarugi Y, Tanaka R, Hayashi T. CT findings of the infraorbital space -Special reference to odontogenic infection caused by periapical lesions of the maxillary canine-. J Jpn Stomatol Soc 2008;57(4):371-378 (in Japanese).
102. Saito M, Nishiyama H, Maruyama S, Oda Y, Saku T, Hayashi T. Adenoid cystic carcinoma of sublingual gland involving the submandibular duct. Dentomaxillofac Radiol. 2008;37(7):421-424.
103. Taira S, Nikkuni Y, Hayashi T, Hoshina H, Shingaki S. Clinical usefulness of real-time tissue elastography in the evaluation of cervical lymph node metastases in patients with oral cancer. Japanese Journal of Head and Neck Cancer 2008;34(4):518-525 (in Japanese).
104. Izumo T, Ozeki S, Okada N, Okabe S, Okazaki Y, Kirita T, Kusama M, Sato T, Shinohara S, Shintani S, Tanaka Y, Nakayama E, Hayashi T, Miyazaki A, Yagishita H, Yamane M. General rules for clinical and pathological studies on oral carcinomas: 4. carcinomas of the upper gingiva and hard palate (first ed.), a proposal from the working group 1, scientific committee, Japan Society for Oral Tumors. J Jpn Soc Oral Tumor 2009;21(2):71-121 (in Japanese).
105. Ono K, Yagi M, Ohuchi A, Uoshima K, Hayashi T, Saito I, Okiji T, Maeda T, Yamada Y. An evaluation of the new dental curriculum for undergraduates at the Niigata University Faculty of Dentistry. Niigata Dent J 2009;39(1):29-49 (in Japanese).
106. Tomaru M, Hayashi T, Shingaki S, Saito C. Diagnostic accuracy of a portable ultrasound system for the detection of cervical lymph node metastases in patients with oral cancer. Jpn J Oral Maxillofac Surg 2009;55(8):408-414 (in Japanese).
107. Yahata M, Yamada K, Hayashi T, Saito I. Unilateral condylar bone deformity and slope of articular eminence related to mandibular asymmetry. Cranio 2009;27(4):261-267.
108. Katsura K, Goto S, Sasai K, Sato K, Tomita M, Matsuyama H, Hayashi T. The effect of dental management of maintaining dental health in patients with head and neck cancer after radiotherapy. Japanese Journal of Head and Neck Cancer 2009;35(3):266-272 (in Japanese).
109. Kodama Y, Fukuda J, Watanabe N, Nishiyama H, Ono K, Saito I, Hayashi T, Takagi R. Correction of mandibular asymmetry due to hemifacial microsomia using a custom-made implant. Asian J Oral Maxillofac Surg 2009;20:204-208.
110. Hoshina Y, Hayashi T, Shingaki S, Saito C. Imaging features of in-transit lymph node metastases in patients with tongue carcinoma. J Jpn Soc Oral Tumor 2010;22(21):25-36 (in Japanese).
111. Hayashi T, Sano T, Shoji N, Suenaga S, Taguchi A, Chikui T, Nakayama E, Murakami S, Kobayashi K, Nishiyama H. Establishment of clinical practice guidelines for diagnostic imaging in temporomandibular joint disorders. Journal of the Japanese Association for Dental Science. 2010;29:57-61 (in Japanese).
112. Okumura N, Stegaroiu R, Nishiyama H, Kurokawa K, Kitamura E, Hayashi T, Nomura S. Finite element analysis of implant-embedded maxilla model from CT data: comparison with the conventional model. J Prosthodont Res. 2011;55(1):24-31.
113. Tanaka R, Hayashi T, Ohshima H, Ida-Yonemochi H, Kenmotsu S, Ike M. CT anatomy of the anterior superior alveolar nerve canal: a macroscopic and microscopic study. Oral Radiol 2011;27(2):93-97.
114. Katsura K, Maruyama S, Suzuki M, Saku T, Takagi R, Hayashi T. A case of desmoplastic ameloblastoma arising in the maxillary alveolus: the origin and time-course changes in the early stage of tumour development observed on dental radiographs. Dentomaxillofac Radiol 2011;40:126-129.
115. Hayashi T. Application of ultrasonography in dentistry. Jpn Dent Sci Rev 2012;48:5-13.
116. Izumo T, Kirita T, Ariji E, Ozeki S, Okada N, Okabe S, Okazaki Y, Omura K, Kusama M, Sato T, Shinohara M, Shimozato K, Shintani S, Tanaka Y, Nakayama E, Hayashi T, Miyazaki A, Yagishita H, Yamane M; Working Group 1 on the "Guidelines for Clinical and Pathological Studies of Oral Cancer", Scientific Committee, Japan Society for Oral Tumors. General rules for clinical and pathological studies on oral cancer: a synopsis. Jpn J Clin Oncol 2012;42(11):1099-1109.
117. Katsura K, Ito K, Nohno K, Funayama S, Saito M, Hayashi T. Evaluation of the relationship between salivation ability and blood flow velocity in the submandibular gland using pulsed Doppler ultrasonography. Oral Radiol 2013;29:13-18.
118. Tsuneki M, Maruyama S, Yamazaki M, Abe T, Adeola H, Cheng J, Nishiyama H, Hayashi T, Kobayashi T, Takagi R, Funayama A, Saito C, Saku T. Inflammatory histopathogenesis of nasopalatine duct cyst: a clinicopathological study of 41 cases. Oral Dis. 2012 Sep 13.
119. Saito M, Nishiyama H, Oda Y, Shingaki S, Hayashi T. The lingual lymph node identified as a sentinel node on CT lymphography in a cN0 squamous cell carcinoma of the tongue -report of a case-. Dentomaxillofac Radiol 2012;41(3):254-258.
120. Kodama Y, Seo K, Hayashi T, Kobayashi T, Niwano M, Koyama T, Murayama M, Takagi R. Orofacial pain related to traumatic neuroma in a patient with multiple TMJ operations. Cranio 2012;30(3):183-187.
121. Arashiyama T, Kodama Y, Kobayashi T, Hoshina H, Takagi R, Hayashi T, Cheng J, Saku T. Ghost cell odontogenic carcinoma arising in the background of a benign calcifying cystic odontogenic tumor of the mandible. Oral Surg Oral Med Oral Pathol Oral Radiol 2012;114(3):e35-40. Epub 2012 Jun 1.
122. Katsura K, Ito K, Nohno K, Funayama S, Saito M, Hayashi T. Evaluation of the relationship between salivation ability and blood flow velocity in the submandibular gland using pulsed Doppler ultrasonography. Oral Radiol 2013;29(1):13-18.
123. Nikkuni Y, Nishiyama H, Hayashi T. Clinical significance of T2 mapping MRI for the evaluation of masseter muscle pain in patients with temporomandibular joint disorders. Oral Radiol 2013;29(1):50-55.
124. Togashi M, Kobayashi T, Hasebe D, Funayama A, Mikami T, Saito I, Hayashi T, Saito C. Effects of surgical orthodontic treatment for dentofacial deformities on signs and symptoms of temporomandibular joint. J Oral Maxillofac Surg Med Pathol 2013;25:18-23.
125. Katsumi Y, Tanaka R, Hayashi T, Koga T, Takagi R, Ohshima H. Variation in arterial supply to the floor of the mouth and assessment of relative hemorrhage risk in implant surgery. Clin Oral Implants Res 2013;24(4):434-440.
126. Kodama Y, Tanaka R, Kurokawa A, Ohnuki H, Sultana S, Hayashi T, Iizuka T, Takagi R. Severe destruction of the temporomandibular joint with complete resorption of the condyle associated with synovitis, acne, pustulosis, hyperostosis, and osteitis syndrome. Oral Surg Oral Med Oral Pathol Oral Radiol. 2013 May 8.
127. Tanaka R, Hayashi T, Ike M, Noto Y, Goto TK. Reduction of dark-band-like metal artifacts caused by dental implant bodies using hypothetical monoenergetic imaging after dual-energy computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol 2013;115(6):833-838.
128. Stegaroiu R, Kurokawa K, Takano R, Nishiyama H, Hayashi T. Towards the establishment of a trabecular model to predict bone stress around implants from cone-beam computed tomography images. Revista Romana de Stomatologie (Ro J Stomatol), 2013;59(3):254-257.
129. Arashiyama T, Takagi R, Ajima H, Ikeda N, Ohnuki H, Saito T, Hayashi T. Sagittal fracture of the mandibular condylar head caused by falling accidents:—A clinical study and its onset mechanism—. Journal of the Japanese Stomatological Society 2013;62(3):215-223 (in Japanese).
130. Ike M, Tanaka R, Soga M, Nishiyama H, Hayashi T. A study on the appropriate scanning exposure condition for the AUGE SOLIO. Niigata Dent J 2013;43(2):25-30 (in Japanese).
131. Metwaly H, Cheng J, Maruyama S, Yamazaki M, Essa A, Abéa T Babkair H, Hoshina H, Takagi R, Hayashi T, Saku T. Central neurofibroma of the mandible: Report of a case and review of the literature. J Oral Maxillofac Surg Med Pathol 2013;25:294–298.
132. Tanaka R, Hayashi T. Potential applications of dual energy computed tomography in dentomaxillofacial imaging. J Radiol Radiat Ther 2014;2(2):1048.
133. Saito M, Sugawara Y, Katsura K, Hayashi T, Sasano T. Assessment of oral care from the viewpoint of candida species for patients undergoing radiotherapy for head and neck cancer. Japanese journal of oral diagnosis/oral medicine 2014;27(1):1-6 (in Japanese).
134. Hayashi T, Tanaka R, Yamazaki M, Cheng J, Oda Y, Hayashi H, Takeishi E, Honma K, Nishiyama H. Detection of subsequent cervical lymph node metastasis in a patient with gingival carcinoma using computed tomography perfusion with a single-compartment kinetic model. Oral Radiol 2014;30(2):186-191.
135. Funayama A, Shingaki S, Kano H, Hayashi T, Saku T, Saito C. A case of sarcoidosis occurring in the mandible. Jpn J Oral Maxillofac Surg 2014;60(6):348-353 (in Japanese).
136. Hayashi T. Chapter 5: Imaging and Classification of Staging in: Kirita T and Omura K (eds). Oral Cancer - Diagnosis and Therapy, Springer, Tokyo, pp99-155, 2015.
137. Tanaka R, Saito M, Abe T, Ajima H, Saku T, Hayashi T. Mandibular osteonecrosis in a patient receiving denosumab and sunitinib. J Med Cases 6(9):393-398, 2015.
138. Hara Y, Ikeda N, Takagi R, Horino K, Iida A, Nishiyama H, Hayashi T, Cheng J, Saku T. Basaloid squamous cell carcinoma of the uvula: Report of a case and review of the literature. J Oral Maxillofac Surg Med Pathol 2016:28(3):234-238.
139. Katsura K, Soga M, Abe E, Matsuyama H, Aoyama H, Hayashi T. Effects of casein phosphopeptide–amorphous calcium phosphate with sodium fluoride on root surface conditions in head and neck radiotherapy patients. Oral Radiol 2016;32:105-110.
140. Hayashi-Sakai S, Hayashi T, Sakamoto M, Sakai J, Shimomura-Kuroki J, Nishiyama H, Katsura K, Ike M, Nikkuni Y, Nakayama M, Soga M, Kobayashi T. Nondestructive microcomputed tomography evaluation of mineral density in exfoliated teeth with hypophosphatasia. Case Reports in Dentistry Volume 2016 (2016) Article ID 4898456.
141. Nishino K, Kohara A, Yakita A, Ochi K, Hayashi T, Takagi R, Kobayashi T, Terada K, Saito I. Three-dimensional analysis of facial changes in skeletal Class III patients following mandibular setback surgery. Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology 2016;28(6):481–487.
142. Horiuchi S, Kobayashi T, Ike M, Tanaka R, Hayashi T. Ultrasonographic dynamic evaluation of synchronous motion of the hyoid bone and the mandibular condyle: a new approach for predicting the treatment response to oral appliance in obstructive sleep apnea syndrome. Dental Radiology 2016;56(2):64-69 (in Japanese).
143. Hayashi T. Intraoral sonographic findings on the tumor invasion front of tongue carcinoma and the application of CT perfusion for the early detection of the lymph node metastases. 2017;63(2):58-61．Japanese Journal of Oral and Maxillofacial Surgery 2017;63(2):58-61 (in Japanese)．
144. Ike M, Hayashi T. An urgent need for radiation protection education and dose assessment in the dental field. Radiation Environment and Medicine 2017;6(2):81-87.
145. Shingaki M, Nikkuni Y, Katsura K, Ikeda N, Maruyama S, Takagi R, Hayashi T. Clinical significance of intraoral strain elastography for diagnosing early-stage tongue carcinoma: a preliminary study. Oral Radiol 2017;33:204-211.
146. Takashima M, Arai Y, Kawamura A, Hayashi T, Takagi R. Quantitative evaluation of masseter muscle stiffness in patients with temporomandibular disorders using shear wave elastography. J Prosthodont Res. 2017;61(4):432-438.
147. Hoshina Y, Hayashi T. A case of chronic osteomyelitis of the jaw possibly associated with Denosumab used for the treatment of glucocorticoid-induced osteoporosis. Japanese Journal of Oral Diagnosis / Oral Medicine 2017;30(2):206-211 (in Japanese).
148. Kojima T, Mikami T, Hayashi T, Maruyama S, Yamazaki M, Kobayashi T. A case of small cell carcinoma arising in the palatine gland. Japanese Journal of Oral and Maxillofacial Surgery 2017;63(7):358-363 (in Japanese).
149. Hayashi T, Arai Y, Chikui T, Hayashi‑Sakai S, Honda K, Indo H, Kawai T, Kobayashi K, Murakami S, Nagasawa M, Naitoh M, Nakayama E, Nikkuni Y, Nishiyama H, Shoji N, Suenaga S, Tanaka R. A Committee on Clinical Practice Guidelines, Japanese Society for Oral and Maxillofacial Radiology. Clinical guidelines for dental cone-beam computed tomography Oral Radiol 2018;34:89-104.
150. Niimi K, Shingaki S, Funayama A, Mikami T, Nishiyama H, Hayashi T, Yamazaki M, Maruyama S, Saku T, Kobayashi T. Oral and maxillofacial manifestations of methotrexate-associated lymphoproliferative disorder in a patient with rheumatoid arthritis: Report of a case. J Oral Maxillofac Surg Med Pathol 2018;31:86-93. DOI: 10.1016/j.ajoms.2018.07.010.
151. Hayashi‑Sakai S, Sakamoto M, Hayashi T, Kondo T, Sugita K Sakai J, Shimomura‑Kuroki J, Ike M, Nikkuni Y, Nishiyama H. Evaluation of permanent and primary enamel and dentin mineral density using micro-computed tomography. Oral Radiol 2019(1);35(1)29-34.
152. Nikkuni Y, Nishiyama H, Hyayashi T. The relationship between masseter muscle pain and T2 values in temporomandibular joint disorders. Oral Surg Oral Med Oral Pathol Oral Radiol 2018;126(4):349-354.
153. Mikami T, Kato Y, Kojima T, Abe T, Maruyama S, Nishiyama H, Hayashi T, Kobayashi T. An unusual and difficult diagnosis of synovial chondromatosis: A case report. Oral Maxillofac Surg Med Pathol 2018; 30(5):422-427.
154. Tsuneki M, Maruyama S, Yamazaki M, Niimi K, Kobayashi T, Nishiyama H, Hayashi T, Tanuma J. Masseter muscle hypertrophy: A case report. Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology 2019;31(6):428-431.
155. Soga M, Katsura K, Nishiyama H, Kobayashi H, Takamura M, Hayashi T. Normal findings of the minor salivary glands on intraoral ultrasonography. Dental Radiology 2020;60(2):35-41 (in Japanese).
154. Hayashi-Sakai S, Kobayashi T, Sakamoto M, Hayashi T, Morise Y, Nikkuni Y, Takamura M, Sakai J, Shimomura-Kuroki J, Ike M, Nishiyama H. Quantitative evaluation of elasticity of lower orbicularis oris muscle during the lip closing measurement using a sonographic elastography, Biomed Mater Eng. 2020;31(6):361-371. doi: 10.3233/BME-201101.
155. Katsura K, Funayama S, Ito K, Nohno K, Kaneko N, Takamura M, Soga M, Kobayashi T, Hayashi T. Radiological imaging features of the salivary glands in xerostomia induced by an immune checkpoint inhibitor. Oral Radiol. 2020. https://doi.org/10.1007/s11282-020-00480-9.
156. Kobayashi R, Takagi R, Nikkuni Y, Maruyama S, Yamazaki M, Uenoyama A, Tanuma J, Hayashi T, Kodama Y. A case of primary intraosseous carcinoma related impacted lower third molar. Journal of Japan Society for Oral Tumors 2020;32(4):243-250 (in Japanese).
157. Ito G, Kodama Y, Ohnuki H, Takamura M, Hayashi T, Abe T, Tanuma J, Kobayashi T, Takagi R. A case of fibrous dysplasia of the maxilla requiring re-osteotomy 17 years later. Niigata Dent J. 2020;50(2):41-47(in Japanese).
158. Taguchi A, Tanaka R, Kakimoto N, Morimoto Y, Arai Y, Hayashi T, Kurabayashi T, Katsumata A, Asaumi J & Japanese Society for Oral and Maxillofacial Radiology. Clinical guidelines for the application of panoramic radiographs in screening for osteoporosis. Oral Radiol. 2021 Feb 23. doi: 10.1007/s11282-021-00518-6.
159. Ota Y, Noguchi T, Ariji E, Fushimi C, Fuwa N, Harada H, Hayashi T, Hayashi R, Honma Y, Miura M, Mori T, Nagatsuka H, Okura M, Ueda M, Uzawa N, Yagihara K, Yagishita H, Yamashiro M, Yanamoto S, Kirita T: Scientific committee on general rules for clinical and pathological studies of oral cancer, Japanese Society of Oral Oncology. General rules for clinical and pathological studies on oral cancer (2nd Edition): A Synopsis. Int J Clin Oncol. 2021;26:623–635. doi: 10.1007/s10147-020-01812-9.
160. Hayashi T, Takamura M, Kobayashi T, Nikkuni Y, Katsura K. Regarding the acoustic coupling medium for the estimation of the depth of invasion in tongue squamous cell carcinoma on intraoral sonography with special reference to the interpretation of normal mucosal structure: a literature review. Oral Sci Int. 2022;19(1):19-23. doi: 10.1002/osi2.1110.
161. Katsura K, Soga Y, Zenda S, Nishi H, Soga M, Usubuchi M, Mitsunaga S, Tomizuka K, Konishi T, Yatsuoka W, Ueno T, Aragaki T, Hayashi T. A cost-minimization analysis of measures against metallic dental restorations for head and neck radiotherapy. J Radiat Res. 2021 Feb 23;rrab003. doi: 10.1093/jrr/rrab003.
162. Kawamura T, Fukui T, Nishiyama H, Kobayashi T, Takagi R, Hayashi T, Saito I. Three-dimensional analysis of the temporal bone and mandibular morphology in mandibular prognathism with facial asymmetry. Oral Sci Int. 2022;19(1):44-51. doi: 10.1002/osi2.1111.
163. Kawaharada M, Katagiri W, Maruyama S, Nishiyama H, Hayashi T, Kobayashi T, Tanuma J. Low-grade myofibroblastic sarcoma of the tongue with difficulty of diagnosis: A case report and review of the literature. Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology. 2021;33:93–97. doi: 10.1016/j.ajoms.2020.07.011.
164. Takamura M, Kobayashi T, Nikkuni Y, Katsura K, Yamazaki M, Maruyama S, Tanuma J, Hayashi T. A comparative study between CT, MRI, and intraoral US for the evaluation of the depth of invasion in early stage (T1/T2) tongue squamous cell carcinoma. Oral Radiol. 2022;38(1):114-125. doi: 10.1007/s11282-021-00533-7.
165. Hayashi T, Takamura M, Kobayashi T, Nikkuni Y, Katsura K, Tomihara K, Tanuma J. Discrepancies between imaging and histopathology in the evaluation of invasion depth of oral cancer. Journal of Japanese Sosuety of Oral Oncology 2022;34(4):151-158 (in Japanese).
166. Kobayashi T, Hayashi T, Takamura M,Soga M, Nikkuni Y, Katsura K. A phantom study regarding the formation mechanism of mucosal epithelial echo on intraoral ultrasonography. Oral Sci Int. 2022;19(3):147-153, doi: 10.1002/osi2.1129.
167. Nikkuni Y, Nishiyama H, Hayashi T. Histogram analysis of 18F-FDG PET imaging SUVs may predict the histological grade of oral squamous cell carcinoma. Oral Surg Oral Med Oral Pathol Oral Radiol. 2022;134(2):254-261. doi: 10.1016/j.oooo.2022.03.005.
168. Takami H, Hayashi T, Sato N, Ohshima H. Macroscopic anatomy of the layered structures of facial muscles and Fasciae in the temporal-malar-mandible-neck region. The Journal of Craniofacial Surgery. 2022;33:2258-2266. DOI: 10.1097/SCS.0000000000008700.
169. Endo S, Niimi K, Kato Y, Nohno K, Hasebe D, Hayashi T, Saito I, Kobayashi T. Examination of factors affecting condylar bone changes following surgical-orthodontic treatment. Cranio. 2022;13;1-11. doi: 10.1080/08869634.2022.2118263.
170. Kurita H, Umeda M, Ueno T, Uzawa N, Shibuya Y, Nakamura N, Nagatsuka H, Hayashi T, Mizoguchi I, Tomihara K, Ikegami Y, Noguchi K, Takiguchi Y, Yamamoto N, Sakai H. Management of odontogenic foci of infection (dental caries, periodontal disease and odontogenic infections) in the oral functional management of patients receiving cancer treatments: Guidelines based on a systematic review. Oral Sci Int 2023. DOI: https://doi.org/10.1002/osi2.1209.
171. Hayashi T. Ultrasonography in tongue squamous cell carcinoma and cervical lymph node metastasis. Japanese Journal of Oral and Maxillofacial Surgery 2023;69(12):536-542 (in Japanese).
172. Katsura K, Tanabe S, Nakano H, Sakai M, Ohta A, Kaidu M, Soga M, Kobayashi T, Takamura M, Hayashi T. The relationship between the contouring time of the metal artifacts area and metal artifacts in head and neck radiotherapy. Tomography 2023;9(1):98-104.
173. Hayashi-Sakai S, Kobayashi T, Hayashi T, Shimomura-Kuroki J, Sakai J, Sakamoto M. Visual evaluation for the elasticity of suprahyoid muscles using sonographic elastography during tongue pressure measurement: A pilot study. Biomed Mater Eng 2023;34(2):159-168. doi:10.3233/BME-221414.
174. Takamura M, Nikkuni Y, Hayashi T, Katsura K, Nishiyama H, Yamazaki M, Maruyama S, Tanuma J. Comparing the diagnostic accuracy of ultrasonography, CT, MRI, and PET/CT in cervical lymph node metastasis of oral squamous cell carcinoma. Biomedicines 2023;11:3119. https://doi.org/10.3390/biomedicines11123119.
175. Katagiri W, Saito D, Maruyama S, Ike M, Nishiyama H, Hayashi T, Tanuma J, Kobayashi T. Masticatory muscle tendon-aponeurosis hyperplasia that was initially misdiagnosed for polymyositis: a case report and review of the literature. Maxillofac Plast Reconstr Surg. 2023 May 1;45(1):18. doi: 10.1186/s40902-023-00386-6.
176. Hayashi T, Nikkuni Y, Nishiyama H. Imaging of the cervical lymphadenopathy: with a special reference to the role of ultrasonography. Japanese Journal of Oral and Maxillofacial Surgery 2024;70(2):42-48 (in Japanese).

External research grants received
2021-2024 A multi-institutional collaborative study on the diagnostic accuracy of the depth of invasion in tongue carcinoma using mobile oral echo. Grant-in-Aid for Scientific Research (C), Principal investigator, 3,200,000 JPY (21K10064).
2018-2021 Standardization of the assessment of the depth of invasion in oral cancer using intraoral ultrasonography. Grant-in-Aid for Scientific Research (C), Principal investigator, 3,500,000 JPY (18K09763).
2015-2018 A novel treatment strategy for early stage tongue carcinoma using intraoral ultrasonography. Grant-in-Aid for Challenging Exploratory Research, Principal investigator, 1,800,000 JPY (15K15692).
2011-2013 A novel visualization approach on a 64-row multidetector CT perfusion in the early d etection of subclinical cervical lymph node metastases. Grant-in-Aid for Scientific Research (C), Principal investigator, 3,800,000 JPY
2006-2007 Establishment of the methodology and diagnostic criteria in the use of intraoral ultrasonography for squamous cell carcinoma of the tongue. Grant-in-Aid for Scientific Research (C), Principal investigator, 2,900,000 JPY
2001-2004 A study on the optimal image acquisition protocol of the helical CT for diagnosing the lymph node metastases in patients with oral cancer. Grant-in-Aid for Scientific Research (C), Principal investigator, 3,000,000 JPY

Academic awards
1. Nikkuni Y, Nishiyama H, Hayashi T (corresponding author). Clinical significance of T2 mapping MRI for the evaluation of masseter muscle pain in patients with temporomandibular joint disorders. A prize for young researcher awarded by Japanese Society for Oral and Maxillofacial Radiology, A prize for young researcher awarded by Japanese Society for Oral and Maxillofacial Radiology, 2014
2. Katsura K, Ito J, Hayashi T, Taira S, Nakajima S. Cortical splitting of the mandible after irradiation -special reference to osteoradionecrosis-, A prize for young researcher awarded by Japanese Society for Oral and Maxillofacial Radiology, 2002
3. Hayashi T. Poster presentation award in 12th congress of Japanese Society for Temporomandibular Joint, 1999
4. Hayashi T. Axial CT findings of articular disc displacement in the temporomandibular joint. A prize for young researcher awarded by Japanese Society for Oral and Maxillofacial Radiology, 1996

Teaching activities
To undergraduate students
1995-present Lectures of Basic Radiology to the undergraduate students (the second grade students)
1) Basic principles of CT
2) Basic principles of ultrasonography
3) Basic principles of nuclear medicine
1995-present Lectures of Dental Radiology (Oral and Maxillofacial Radiology) to the undergraduate students (the fourth grade students)
1) Introduction
2) Cysts
3) Benign/malignant tumors
4) Salivary gland lesions
5) Systemic diseases
6) Neck soft-tissue lesions
7) Oral cancers
8) Maxillary sinus lesions
9) Traumas
2004-2022 A program director and a facilitator at the Problem Based Learning (PBL)
To the fifth grade students of School of Dentistry; 5 months / year
To students of School of Oral Health and Welfare; Full PBL
1987-2002 An instructor of Clinical Practice Lessons To the fifth grade students of School of Dentistry; Polyclinics; Radiography (Knowledge and skill of intraoral and panoramic radiography)
For sixth grade student of School of Dentistry; Clinical practice Radiology (interpretation and diagnosis of pathologies in oral and maxillofacial region using intra- and extra-oral radiographs, cone-beam CT and medical CT)

To graduate students
2002-2024 A supervisor for PhD students
1) Takamura M. A comparative study between CT, MRI, and intraoral US for the evaluation of the depth of invasion in early stage (T1/T2) tongue squamous cell carcinoma.
2) Soga M. Normal findings of the minor salivary glands on intraoral ultrasonography. Dental Radiology 2020;60(2):35-41 (in Japanese).
3) Kobayashi T. A phantom study for the interpretation of the mucosal epithelial echo on intraoral sonography.
4) Horiuchi S. Ultrasonographic dynamic evaluation of synchronous motion of the hyoid bone and the mandibular condyle: a new approach for predicting the treatment response to oral appliance in obstructive sleep apnea syndrome. Dental Radiology 2016;56(2):64-69 (in Japanese).
5) Shingaki M. Clinical significance of intraoral strain elastography for diagnosing early-stage tongue carcinoma: a preliminary study. Oral Radiol 2017;33:204-211.
6) Tomaru M. Diagnostic accuracy of a portable ultrasound system for the detection of cervical lymph node metastases in patients with oral cancer. Jpn J Oral Maxillofac Surg 2009;55(8):408-414 (in Japanese).
7) Ikarugi Y. CT findings of the infraorbital space -Special reference to odontogenic infection caused by periapical lesions of the maxillary canine-. J Jpn Stomatol Soc 2008;57(4):371-378 (in Japanese).
8) Sakuma K. Ultrasonography of periapical lesion: comparison with CT. Dental Radiology 2007;47(2):53-64 (in Japanese).
9) Fan S. The relationship between articular pain and MR findings in patients with a unilateral non-reducible anterior disk displacement in the temporomandibular joint. Niigata Dent J 2002;32(1):11-15 (in Japanese).
2005-2013 A supervisor for dissertation PhD
1) Nikkuni Y. Clinical significance of T2 mapping MRI for the evaluation of masseter muscle pain in patients with temporomandibular joint disorders. Oral Radiol 2013;29(1):50-55.
2) Hoshina Y. Imaging features of in-transit lymph node metastases in patients with tongue carcinoma. J Jpn Soc Oral Tumor 2010;22(21):25-36 (in Japanese).
3) Tanaka R. Computed tomography findings of chronic osteomyelitis involving the mandible: correlation to histopathological findings. Dentomaxillofac Radiol 2008;37(2):94-103.
4) Koyama J. Follow-up study of condylar bony changes using helical computed tomography in patients with temporomandibular disorder. Dentomaxillofac Radiol 2007;36(8):472-477.
5) Katsura K. Non-neoplastic process after neck dissection demonstrated on enhanced CT in patients with head and neck cancer. Dentomaxillofac Radiol. 2005;34(5):297-303.

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