Toshikazu Nagasaki

Last Updated :2025/06/04

Affiliations, Positions
Graduate School of Biomedical and Health Sciences(Dentistry & Oral Health Sciences), Assistant Professor
E-mail
or1ymdahiroshima-u.ac.jp
Self-introduction
Conducting research and medical treatment focusing on diagnostic imaging of dysphagia

Basic Information

Academic Degrees

  • Ph.D., Hiroshima University

Research Fields

  • Medicine,dentistry, and pharmacy;Dentistry;Pathobiological dentistry / Dental radiology

Research Keywords

  • MRI
  • Swallow
  • swallowing sound
  • Magnetoencephalography
  • dysphagia

Affiliated Academic Societies

  • International Association of Dentomaxillifacial Radiology
  • Japanese Society for Oral and Maxillofacial Radiology
  • Japan Dental Education Association
  • The Japanese Stomatological Society
  • Japan Biomagnetism and Bioelectromagnetics Society
  • Japan Prosthodontic Society
  • The Japanese Society of Dysphagia Rehabilitation

Educational Activity

Course in Charge

  1. 2025, Undergraduate Education, 2Term, Oral Radiology I
  2. 2025, Undergraduate Education, 3Term, Oral Radiology II
  3. 2025, Undergraduate Education, 4Term, Basic Seminar of Oral Radiology
  4. 2025, Undergraduate Education, 1Term, Dysphagia Rehabilitation
  5. 2025, Undergraduate Education, First Semester, Dental Research Practices I
  6. 2025, Undergraduate Education, Second Semester, Dental Research Practices II
  7. 2025, Undergraduate Education, 2Term, General Seminar on Clinical Dentistry
  8. 2025, Undergraduate Education, First Semester, Dental Research Practices III
  9. 2025, Undergraduate Education, Year, Clinical Practice (Dental Radiology)
  10. 2025, Undergraduate Education, 3Term, Oral Radiology
  11. 2025, Undergraduate Education, 1Term, Dysphagia Rehabilitation
  12. 2025, Undergraduate Education, Second Semester, Clinical Practice on Oral Health
  13. 2025, Undergraduate Education, Intensive, Clinical Practice on Oral Health
  14. 2025, Undergraduate Education, Intensive, Clinical Practice on Oral Health Management
  15. 2025, Undergraduate Education, 1Term, Removable Denture and Health Engineering (Partial Denture)
  16. 2025, Undergraduate Education, First Semester, Overview of Oral Engineering
  17. 2025, Undergraduate Education, 1Term, Dysphagia Rehabilitation
  18. 2025, Undergraduate Education, Second Semester, Clinical Practice in Oral Health Engineering
  19. 2025, Undergraduate Education, First Semester, Clinical Practice in Oral Health Engineering
  20. 2025, Undergraduate Education, Second Semester, Clinical Practice in Oral Health Engineering
  21. 2025, Graduate Education (Doctoral Program) , First Semester, Advanced Seminar on Oral and Maxillofacial Radiology
  22. 2025, Graduate Education (Doctoral Program) , Second Semester, Advanced Seminar on Oral and Maxillofacial Radiology
  23. 2025, Graduate Education (Doctoral Program) , First Semester, Advanced Research on Oral and Maxillofacial Radiology
  24. 2025, Graduate Education (Doctoral Program) , Second Semester, Advanced Research on Oral and Maxillofacial Radiology

Research Activities

Academic Papers

  1. Image preprocessing with contrast-limited adaptive histogram equalization improves the segmentation performance of deep learning for the articular disk of the temporomandibular joint on magnetic resonance images, ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY, 138(1), 128-141, 202407
    Link to Paper Search Results by DOI
  2. Cervical percutaneous interferential current stimulation improves citric acid cough tests in patients with Parkinson's disease on medication, SCIENTIFIC REPORTS, 14(1), 20240518
    Link to Paper Search Results by DOI
  3. Image preprocessing with contrast-limited adaptive histogram equalization improves the segmentation performance of deep learning for the articular disk of the temporomandibular joint on magnetic resonance images, Oral Surg Oral Med Oral Pathol Oral Radiol, 138(1), 128-141, 20240601
    Link to Paper Search Results by DOI
  4. ★, Association between motor symptoms of Parkinson's disease and swallowing disorders, NEUROLOGICAL SCIENCES, 45(5), 2021-2026, 202405
    Link to Paper Search Results by DOI
  5. Prospective Observational Study for the Comparison of Screening Methods Including Tongue Pressure and Repetitive Saliva Swallowing With Detailed Videofluoroscopic Swallowing Study Findings in Patients With Acute Stroke, JOURNAL OF THE AMERICAN HEART ASSOCIATION, 13(3), 20240206
    Link to Paper Search Results by DOI
  6. ★, Videofluoroscopic analysis of the laryngeal movement of older adults in swallowing, ODONTOLOGY, 112(2), 624-629, 202404
    Link to Paper Search Results by DOI
  7. Cone-beam computed tomography-based investigation of pre-eruptive intracoronal resorption prevalence, ODONTOLOGY, 112(1), 256-263, 202401
    Link to Paper Search Results by DOI
  8. ★, Detailed findings of videofluoroscopic examination among patients with Parkinson's disease on the effect of cervical percutaneous interferential current stimulation, FRONTIERS IN NEUROLOGY, 14, 20231107
    Link to Paper Search Results by DOI
  9. ★, Swallowing sound index analysis using electronic stethoscope and artificial intelligence for patients with Parkinson's disease, JOURNAL OF THE NEUROLOGICAL SCIENCES, 454, 20231115
    Link to Paper Search Results by DOI
  10. Impact of neck percutaneous interferential current sensory stimulation on swallowing function in patients with Parkinson's disease: A single-arm, open-label study protocol, CONTEMPORARY CLINICAL TRIALS COMMUNICATIONS, 33, 202306
    Link to Paper Search Results by DOI
  11. Automated segmentation of articular disc of the temporomandibular joint on magnetic resonance images using deep learning, Scientic reports, 12(1), 221-230, 202201
    Link to Paper Search Results by DOI
  12. Association between stroke lesions and videofluoroscopic findings in acute stroke patients, Journal of Neurology, 268(3), 1025-1035, 20210328
  13. Intra- and inter-examination reproducibility of T2 mapping for temporomandibular joint assessment at 3.0 T, SCIENTIFIC REPORTS, 12(1), 20220629
    Link to Paper Search Results by DOI
  14. Bone formation in a cartinoma of the maxillary antrum, Dentomaxillofacial Radiology, 375-377, 19990401
  15. Effect of lingual nerve anesthesia on swallowing using cinefadiography., Dentistry in Japan, 98-101, 20000401
  16. Realtionship between maxillofacial morphology and deglutitive tongue movement in patients with anterior open bite, American Journal of Orthodontics and Dentofacial Orthopedics, 125(5), 160-167, 20040201
  17. Application of a palatal plate in amyotropic lateral sclerosis: a case report, Oral Radiology, 20, 76-79, 20040401
  18. Aspects of swallowing in healthy dentate elderly persons older than 80 years., J. Gerontology Bio Sci Med Sci, 60, 605-609, 20050401
  19. Aspects of swallowing in healthy dentate elderly persons older than 80 years?, Journals of Gerontology - Series A Biological Sciences and Medical Sciences, 60, 506-509, 20050401
  20. Radiographic evaluation of the fate of developing tooth buds on the fracture line of mandibular fractures, Journal of Oral and Maxillofacial Surgery, 64, 94-99, 20060401
  21. MEG analysis of swallowing, The cell, 38(2006), 84-87, 20060401
  22. Influence of aging and denture use on liquid swallowing in healthy dentulous and edentulous elderly., J Am Geriatr Soc, 54, 444-449, 20060401
  23. Event-realted desynchronization in command swallowing: A magnetoencephalography study, 13th Annual Dysphagia Research Society Meeting, 85, 20041001
  24. Temporal dynamics of biomagentic cortical rhythms in human command and voluntary swallowing. A magnetoencephalography study, 14th Annual Dysphagia Research Society Meeting, 81, 20060301
  25. Radiographic evaluation of the fate of developing tooth buds on the fracture line of mandibular fractures, J Oral Maxillofac Surg, 64, 94-9, 20060401
  26. Metastatic retinoblastoma of the maxilla and mandible, Dentomaxillofac Radiol, 34, 136-131, 20050401
  27. Metastatic retinoblastoma of the maxilla and mandible, Dentomaxillofacial Radiology, 34(1), 126-131, 20050120
  28. Food and Non-food visual discrimination: A magnetoencephalography study, 16th Annual Dysphagia Research Society Meeting, 271, 20080307
  29. Swallowing sound analysis for healthy adults and dysphagic patients, 16th Annual Dysphagia Research Meeting, 260, 20080307
  30. Contribution of Finite Element Modeling to Assessment of Mandibular Movements, 2nd Hiroshima Conference on Education and Science in Dentistry, 17-22, 20071006
  31. Temporal dynamics of biomagnetic cortical rhythms in left-handed human command and voluntary swallowing, 52(補2), S167-172, 20071130
  32. Effects of tooth loss and denture wear on tongue-tip motion in elderly dentulous and edentulous people., J Oral Rehabil, 35(12), 882-8, 20081201
  33. Effect on tooth loss and denture wear on tongue tip motion in dentulous and edentulous older people, J Oral Rehabil, 35(12), 882-8, 20081201
  34. Comprehensive Oral Management for Collaborative Medical and Dental Care -Practical Approaches for Oral Care Support Team-, The Journal of Hiroshima University Dental Society, 45(1), 1-6, 20130601
  35. Radiographic evaluation of the fate of developing tooth buds on the fracture line of mandibular fractures, JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, 64(1), 94-99, 200606
    Link to Paper Search Results by DOI
  36. Radiographic findings and prognosis of simple bone cysts of the jaws, DENTOMAXILLOFACIAL RADIOLOGY, 39(2), 65-71, 201002
    Link to Paper Search Results by DOI
  37. Deglutitive tongue movement after correction of mandibular protrusion A pilot study, ANGLE ORTHODONTIST, 83(4), 591-596, 201307
    Link to Paper Search Results by DOI
  38. Maximum Tongue Pressure is Associated with Swallowing Dysfunction in ALS Patients, DYSPHAGIA, 32(4), 542-547, 201708
    Link to Paper Search Results by DOI
  39. ★, Maximum Tongue Pressure is Associated with Swallowing Dysfunction in ALS Patients., dysphgia, 32(4), 542-547, 20170419
  40. Candy eating behaviour to improve swallowing function in dementia subjects, ARCHIVES OF GERONTOLOGY AND GERIATRICS, 75, 181-184, 2018
    Link to Paper Search Results by DOI
  41. Differences of Aspiration between Liquid and Solid Foods in Videofluoroscopic Swallowing Study: A Review of Literature, Int J Phys Med Rehabil, 6(1), 446
  42. ★, Multislice Computed Tomography Assessment of Airway Patency Changes Associated with Mandibular Advancement Appliance Therapy in Supine Patients with Obstructive Sleep Apnea., Sleep disorders
  43. Delayed Swallowing Reflex is Overlooked in Swallowing Screening Among Acute Stroke Patients, JOURNAL OF STROKE & CEREBROVASCULAR DISEASES, 29(12), 202012
    Link to Paper Search Results by DOI
  44. Association between stroke lesions and videofluoroscopic findings in acute stroke patients, JOURNAL OF NEUROLOGY, 268(3), 1025-1035, 202103
    Link to Paper Search Results by DOI
  45. Delayed Swallowing Reflex is Overlooked in Swallowing Screening Among Acute Stroke Patients., Journal of Stroke and Cerebrovascular Diseases, 29(12)
  46. Association between stroke lesions and videofluoroscopic findings in acute stroke patients., Journal of Neurology, 268(3), 1025-035
  47. Multislice computed tomography assessment of airway patency changes in the supine position following mandibular setback surgery for mandibular prognathism: A prospective 1-year follow-up study, APOS TRENDS IN ORTHODONTICS, 11(2), 106-115, 2021
    Link to Paper Search Results by DOI
  48. Do various imaging modalities provide potential early detection and diagnosis of medication-related osteonecrosis of the jaw? A review, DENTOMAXILLOFACIAL RADIOLOGY, 50(6), 2021
    Link to Paper Search Results by DOI
  49. Automated segmentation of articular disc of the temporomandibular joint on magnetic resonance images using deep learning, SCIENTIFIC REPORTS, 12(1), 20220107
    Link to Paper Search Results by DOI

Invited Lecture, Oral Presentation, Poster Presentation

  1. Fiberoptic endoscopic evaluation of swallowing may increase pharyngeal residue in postoperative oral cancer patients, Toshikazu Nagasaki, Sachiko Yamada, Mitsuyoshi Yoshida, Mineka Yoshikawa, Kiichi Shimabukuro, Masahiko Ohtsuka, Masaru Konishi, Yoshikazu Suei, Takashi Nakamoto, Naoya Kakimoto, The 13th Asian Congress of Oral and Maxillo-Facial Radiology, 2022/06/03, Without Invitation, English, Asian Academy of Oral and Maxillo-Facial Radiology, Gifu city
  2. A case that tried to improve dysphagia due to stimulant psychosis., Yoshikawa M, Yamada S, YoshidaM, Nagasaki T, Tsuga K, World Dysphagia Summit 2021, 2021/08/21, Without Invitation, English, The Japanese Society of Dysphagia Rehabilitaion, Nagoya, Japan
  3. Should videofluoroscopy and nasoendoscopy examinations be carried out simultaneously during pharyngeal swallowing?, Nagasaki T, amada S., Yoshida M., Yoshikawa M., Verdonschot RG, Yasuhara Y., Shimabukuro K., Wongratanich P., Konishi M., Suei Y., Kakimoto N, 22nd International Congress of Dento-Maxillo-Facial Radiology, 2019/08/23, Without Invitation, Japanese, International Association of Dento-Maxillo-Facial Radiology, Philadelphia
  4. Analysis of background noise in cervical auscultation sound before/after swallowing, Nagasaki, Toshikazu, Yoshikawa, M.; Takagi, S.; Hiraoka, A.; Kawano, H.; Tsuga, K.; Izumi, Y., 6th European Society for Swallowing Disorders Congress, 2016/10/14, Without Invitation, English, European Society for Swallowing Disorders, Milano, Italy
  5. Investigation of the relationship between patients' videofluoroscopic examination and tonguepressure using balloon-type device in acute stroke., Nakamori M., Imamura E., Matsushima H., Maetani Y., Kushitani S., Wakabayashi S., Yoshikawa M., Tsuga K., Nagasaki T., Hosomi N., Maruyama H., The meeting of 58th Annual Meeting of the Japanese Society of Neurology and XXIII World Congress of Neurology, 2017/09/18, Without Invitation, English, World Federation of Neurology, Kyouto