Academic Organization


http://www.dent.niigata-u.ac.jp/radiology/radiology.html




- Study on the diagnostic imaging for oral and maxillofacial regions
- Study on the diagnostic imaging of cervical lymph node metastases

The presence of regional lymph node metastases has a major influence on the prognosis of patients with oral and maxillofacial carcinomas. We proposed the efficacy of monthly repeated sonography in early detection of subsequent lymph node metastases. Sonography is an ideal method for this purpose as it is non-invasive and less expensive than any other imaging modalities.

- Study on the diagnostic magnetic resonance imaging for oral and maxillofacial regions
- Study on the diagnostic ultrasonography for oral and maxillofacial regions
- Study on the diagnostic imaging for jaw deformities
- Study on the clinical significance of three-dimensional imaging for oral and maxillofacial regions
- Study on the prevention and alleviation for complications caused by oral and maxillofacial radiotherapy
- Study on the diagnostic imaging for dental implants
- Study on the plactice for diagnostic imaging




Takafumi HAYASHIProfessor and chairmanoral and maxillofacial radiology, faculity of dentistry
Hideyoshi NISHIYAMAAssociate professor
Kouji KATSURALecturer
Ray TANAKAAssistant professor
Makiko IKEAssistant professor
Yutaka NIKKUNIAssistant professor
助教miwa0113@dent.niigata-u.ac.jp
Marie SOGAResident
Izumi KOYAMAPostgraduate adult student
Satoru HORIUCHIPostgraduate adult student
Taichi KOBAYASHIPostgraduate student
Yukiko HOSHINARegistered dental practitioner





Hayashi T / Chapter 5: Imaging and Classification of Staging / Kirita T and Omura K / Oral Cancer - Diagnosis and Therapy / 1st ed. / Springer / Tokyo, Japan / 2015 / 99 / 155 /

Katsura K and Aoki K / Chapter 15: Oral and Dental Healthcare for Oral Cancer Patients: Planning, Management, and Dental Treatment / / Oral Cancer - Diagnosis and Therapy / 1st ed. / Springer / Tokyo, Japan / 2015 / 345 / 360 /



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 / 30 / 186 / 191 / 2014 / Online Journal

Uesugi T, Kobayashi T, Hasebe R, Tanaka R, Ike M, Saito C. / Effects of orthognathic surgery on pharyngeal airway and respiratory function during sleep in patients with mandibular prognathism. / J. Oral Maxillofac Surg / 43 / 1082 / 1090 / 2014 / Online Journal

Tanaka R, Hayashi T. / Potential applications of dual energy computed tomography in dentomaxillofacial imaging. / J Radiol Radiat Ther / 2 / 1048 / 1048 / 2014 / Online Journal

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 / 25 / 294 / 298 / 2013 / Online Journal

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 / 59 / 254 / 257 / 2013 /

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 / 115 / 833 / 838 / 2013 / Online Journal

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 / 116 / e128 / e133 / 2013 / Online Journal

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 / 24 / 434 / 440 / 2013 / Online Journal

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 / 25 / 18 / 23 / 2013 / Online Journal

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 / 29 / 50 / 55 / 2013 / Online Journal

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 / 29 / 13 / 18 / 2013 / Online Journal

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 / 19 / 415 / 424 / 2013 / Online Journal

Ito K, Funayama S, Katsura K, Kaneko N, Nohno K, Saito M, Yamada A, Sumida Y, Inoue M. / Moistened techniques considered for patients? Comfort and operators? Ease in dental treatment. / Int J Oral-Med Sci / 11 / 85 / 89 / 2012 /

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 / 114 / e35 / e40 / 2012 / Online Journal

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. / 30 / 183 / 187 / 2012 / Online Journal

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 / 41 / 254 / 258 / 2012 / Online Journal

Arasawa M, Oda Y, Kobayashi T, Uoshima K, Nishiyama H, Hoshina H, Saito C. / Evaluation of bone volume changes after sinus floor augmentation with autogenous bone grafts. / Int J Oral Maxillofac Surg / 41 / 853 / 857 / 2012 / Online Journal

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 / General rules for clinical and pathological studies on oral cancer: a synopsis. / Jpn J Clin Oncol / 42 / 1099 / 1109 / 2012 / Online Journal

Hayashi T. / Application of ultrasonography in dentistry. / Jpn Dent Sci Rev / 48 / 5 / 13 / 2012 / Online Journal

Igarashi A, Katsura K, Ito K, Funayama S. / Current status of salivary gland diseases: Sjogren's syndrome and dry mouth. / J Oral Biosci / 53 / 31 / 37 / 2011 /

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 / 40 / 126 / 129 / 2011 / Online Journal

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. / 55 / 24 / 31 / 2011 / Online Journal

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 / 27 / 93 / 97 / 2011 / Online Journal

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. / 105 / 731 / 738 / 2008 / Online Journal

Saito M, Nishiyama H, Maruyama S, Oda Y, Saku T, Hayashi T / Adenoid cystic carcinoma of sublingual gland involving the submandibular duct. / Dentomaxillofac Radiol / 37 / 421 / 424 / 2008 / Online Journal

Tanaka R, Hayashi T / Computed tomography findings of chronic osteomyelitis involving the mandible: correlation to histopathological findings. / Dentomaxillofac Radiol / 37 / 94 / 103 / 2008 / Online Journal

Koyama J, Nishiyama H, Hayashi T / Follow-up study of condylar bony changes using helical computed tomography in patients with temporomandibular disorder. / Dentomaxillofac Radiol / 36 / 472 / 477 / 2007 / Online Journal

Katsura K, Hayashi T. / Non-neoplastic process after neck dissection demonstrated on enhanced CT in patients with head and neck cancer. / Dentomaxillofac Radiol. / 34 / 297 / 303 / 2005 / Online Journal

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 / 96 / 112 / 117 / 2003 / Online Journal

Hayashi T, Tanaka R, Taira S, Koyama J, Katsura K, Kobayashi F. / Non-contrast-enhanced CT findings of high attenuation within metastatic cervical lymph nodes in patients with stage I or II tongue carcinoma during a follow-up period. / AJNR Am J Neuroradiol / 24 / 1330 / 1333 / 2003 / Online Journal

Kobayashi F, Ito J, Hayashi T, Maeda T. / A study of volumetric visualization and quantitative evaluation of bone trabeculae in helical CT. / Dentomaxillofac Radiol / 32 / 181 / 185 / 2003 / Online Journal

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. / Dentomaxillofacial Radiology / 31 / 151 / 153 / 2002 / Online Journal

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 / 18 / 1 / 7 / 2002 /

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 / 18 / 9 / 13 / 2002 /

Koyama J, Ito J, Hayashi T / Periosteal osteosarcoma of the mandible. / Dentomaxillofacial Radiology / 31 / 63 / 64 / 2002 / Online Journal

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 / 22 / 728 / 734 / 2001 / Online Journal

Hayashi T, Ito J, Taira S, Katsura K. / The relationship of primary tumor thickness in carcinoma of the tongue to subsequent lymph node metastasis. / Dentomaxillofacial Radiology / 30 / 242 / 245 / 2001 / Online Journal

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 / 22 / 1203 / 1206 / 2001 / Online Journal

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 / 16 / 17 / 21 / 2000 /

Hayashi T, Ito J, Kato T, Hinoki A, Taira S, Saku T. / Intracortical hemangioma of the mandible. / Dentomaxillofacial Radiology / 28 / 127 / 129 / 1999 / Online Journal

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 / 88 / 106 / 111 / 1999 / Online Journal

Kobayashi F, Sasaki O, Nakanima S, Ito J. / Measurement of layer thickness using spread width of longitudinal image in helical CT. / Oral Radiology / 15 / 85 / 93 / 1999 /






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