Chanon Ngamsombat , M.D.

Division : Radiology department, Department of Radiology

Specialty groups : Body Interventional Radiology

Languages : Thai, English

Field of interests : Interventional oncology, Embolotherapy, Vascular imaging

Research fellow, Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology,
Massachusetts General Hospital, Harvard Medical School
Diplomate, Thai Subspecialty Board of Diagnostic Neuroimaging, Faculty of Medicine, Siriraj Hospital,
Mahidol University, Thailand
Residency in Diagnostic Radiology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Thailand
M.D. Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand
Certification of Visiting Research Fellowship program in Neuroimaging
Certified Thai Board of Diagnostic Neuroimaging
Certified Thai Board of General Radiology
Thai Medical licensing examination
Awards and honors
Second class honors medical doctor from Faculty of Medicine, Siriraj Hospital, Mahidol University
Professional memberships
The Royal College of Radiologist of Thailand
Thai College of Physicians/ Thai Medical Association
Recent publications


  1. Ziyu Li, Qiyuan Tian, Chanon Ngamsombat, Samuel Cartmell et al, High-fidelity fast volumetric brain MRI using a hybrid denoising generative adversarial network (HDnGAN). bioRxiv. 2021
  2. an Q, Zaretskaya N, Fan Q, Ngamsombat C, Bilgic B, Polimeni JR, Huang SY. Improved cortical surface reconstruction using sub-millimeter resolution MPRAGE by image denoising. bioRxiv. 2020.
  3. Tian Q, Bilgic B, Fan Q, Ngamsombat C, Zaretskaya N, Fultz NE, et al. Improving in vivo human cerebral cortical surface reconstruction using data-driven super-resolution. Cereb Cortex. 2021;31(1):463-82.
  4. Russo A, Stockel K, Tobyne S, Ngamsombat C, Brewer K, Huang S, Klawiter E. Associations between corpus callosum damage, clinical disability, and surface-based homologous interhemispheric connectivity in multiple sclerosis. MULTIPLE SCLEROSIS JOURNAL 2020 Dec 1 (Vol. 26, No. 3_ SUPPL, pp. 377-377).
  5. Tian Q, Bilgic B, Fan Q, Liao C, Ngamsombat C, Hu Y, et al. DeepDTI: High-fidelity six-direction diffusion tensor imaging using deep learning. Neuroimage. 2020;219:117017.
  6. Ngamsombat C, Tian Q, Fan Q, Russo A, Machado N, Polackal M, et al. Axonal damage in the optic radiation assessed by white matter tract integrity metrics is associated with retinal thinning in multiple sclerosis. Neuroimage Clin. 2020;27:102293.
  7. Chirapapaisan N, Ngamsombat C, Tanboon J, Cheunsuchon P, Koohasawad S. A Cavernous Venous Malformation of the Orbit Mimicking an Idiopathic Orbital Inflammation. Asian J Neurosurg. 2020;15(3):750-2.
  8. Yu F, Fan Q, Tian Q, Ngamsombat C, Machado N, Bireley JD, et al. Imaging G-Ratio in Multiple Sclerosis Using High-Gradient Diffusion MRI and Macromolecular Tissue Volume. AJNR Am J Neuroradiol. 2019;40(11):1871-7.
  9. Srikajon J, Siritho S, Ngamsombat C, Prayoonwiwat N, Chirapapaisan N, Siriraj Neuroimmunology Research G. Differences in clinical features between optic neuritis in neuromyelitis optica spectrum disorders and in multiple sclerosis. Mult Scler J Exp Transl Clin. 2018;4(3):2055217318791196.
  10. Chawalparit O, Ngamsombat C, Aurboonyawat T, Zhang S. Intracranial Black-Blood Vessel Wall Magnetic Resonance Imaging: Initial Clinical Experience in a Single-Center Study. Siriraj Medical Journal. 2018 Nov 7;70(4):327-34.
  11. Tritrakarn S, Jitprapaikulsan J, Thakolwiboon S, Piyapittayanan S, Ngamsombat C, Chawalparit O, Prayoonwiwat N. Evaluation of the NMOSD 2015 imaging guideline to differentiate between diagnosis of multiple sclerosis and neuromyelitis optica spectrum disorder in Thai patients. Neurology Asia 2018; 23(1) : 61 – 68
  12. Bovonsunthonchai S, Witthiwej T, Ngamsombat C, Sathornsumetee S, Vachalathiti R, Muangpaisan W, Hengsonboon P, Thong-On S, Jankhum S, Yangyoo P. Effect of spinal tap test on the performance of sit-to-stand, walking, and turning in patients with idiopathic normal pressure hydrocephalus. Nagoya J. Med. Sci. 80. 53 – 60, 2018
  13. Piyapittayanan S, Segsarnviriya C, Ngamsombat C, Witthiwej T, Cheunsuchon P, Charnchaowanish P, Chawalparit O. Comparison between Dynamic Contrast-Enhanced MRI and Dynamic Susceptibility Contrast MRI in Glioma Grading. Siriraj Med J 2017;69: 369-376
  14. Witthiwej T, Sukeeyamanon W, Songsaeng D, Ngamsombat C, Charnchaowanish P, Itthimathin P, Chotinaiwattarakul W, Chawalparit O. MRI Study of Morphologic Features and CSF Hydrodynamics to Predict Ventriculoperitoneal Shunt Responsiveness in Normal Pressure Hydrocephalus. J Med Assoc Thai 2017; 100 (Suppl. 4): S32-S40
  15. Ngamsombat C, Zhang Z, Guo H, Lerdthusnee K, Witthiwej T, Muangpaisan W, Wongsripuemtet J, Vichianin Y, Charnchaowanish P, Chawalparit O. Comparison of Microfiber Alteration of Corticospinal Tract in Normal Pressure Hydrocephalus Patients and Normal Controlled Subjects by Diffusion Tensor Imaging, J Med Assoc Thai 2017; 100 (Suppl. 4): S41-S48
  16. Ngamsombat C, Jaiyasawadi A, Witthiwej T, Charnchaowanish P, Chawalparit O. Diffusion Tensor Imaging in Idiopathic Normal Pressure Hydrocephalus: Evaluation Between Shunt Responsive and Shunt Non-Responsive Groups in Siriraj Hospital. Siriraj Med J 2017;69:198-210
  17. Ngamsombat C, Wongsawaeng D, Thuangtong A, Phasukkijwatana N, Prakhunhungsit S, Witthiwej T, Sitthinamsuwan B, Charnchaowanish P, Weankhanan J, Chawalparit O. Preoperative Diffusion Tensor Imaging Analysis of Optic Radiations: Study in Pituitary Macroadenoma Patients with Optic Chiasm Compression, J Med Assoc Thai 2017; 100 (Suppl. 2): S86-S91.
  18. Dumrikarnlert C, Siritho S, Chulapimphan P, Ngamsombat C, Satukijchai C, Prayoonwiwat N. The characteristics of spinal imaging in different types of demyelinating diseases, Journal of the Neurological Sciences 372 (2017) 138–143.
  19. Wongsripuemtet J, Wongfukiat O, Vichianin Y, Ngamsombat C, Witthiwej T, Sitthinamsuwan B, Aurboonyawat T, Chankaew E, Chawalparit O. Feasibility Study of Language Lateralization using Thai Version of Language Paradigm for Functional MRI in Clinical Service. J Med Assoc Thai 2016; 99 (12): 1344-54.
  20. Chawalparit O, Manochiopinig S, Vichianin Y, Wongsripuemtet J, Siwasattayanon P, Ngamsombat C, Chavalparit P, Charnchaowanish P, Pornpunyawuth P, Chaovongphanit S, Wongsawat Y, Ruangvaravate N. Siriraj Thai Language Paradigm for Functional MRI: A Pilot Study in Normal Volunteers, Siriraj Med J 2015;67:181-186.
  21. Ngamsombat C, Wongsripuemtet J, Manochiopinig S, Piyapittayanan S, Chaovongphanit S, Chawalparit O. The arcuate fasciculus: Analysis of white matter connection in Thai language system using diffusion tensor imaging and feasibility in lateralization of the dominant hemisphere. Siriraj Med J 2015;67:205-212.
  22. Prayoonwiwat N, Chawalparit O, Pienpuck W, Ngamsombat C, Wongsripuemtet J, Siritho S. MRI features and anti-AQP4 antibody status in Idiopathic inflammatory demyelinating CNS disease (IIDCD) in Thai patients. Neurology Asia 2013; 18(1) : 73-81.

Textbook chapters

  1. Ngamsombat C. Imaging of Brachial plexus and peripheral nerve. In Sitthinamsuwan B, editor. Neurosurgery for the Peripheral Nerves. SI; 2020.
  2. Ngamsombat C. Pituitary imaging. In Akaraviputh T, Chinsakchai K, Chinswangwatanakul V, editors. Cutting edge in Surgery II: 100th Anniversary Surgical Forum. SI; 2017. pp 224-230.
  3. Ngamsombat C, Chawalparit O. การตรวจการไหลเวียนของน้ำไขสันหลังด้วยเอ็มอาร์ไอ MRI CSF flow study. In Chawalparit O, editor. Clinical MRI in common CNS disease-2nd edition. SI; 2017. pp 350-382.
  4. Ngamsombat C. Diffusion contrast and clinical application. In Chawalparit O, editor. Clinical MRI in common CNS disease-2nd edition. SI; 2017. pp 54-66.
  5. Ngamsombat C. Diagnostic imaging of CA larynx. In Kerekhanjanarong V, editor. Laryngeal carcinoma. CU PRINT; 2015. pp 111-126.