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Prof Lim Choie Cheio Tchoyoson

Prof Lim Choie Cheio Tchoyoson

​MBBS, MMed (Diagnostic Rad), FRCR (Diagnostic Rad) (United Kingdom), FAMS

Senior Consultant

National Neuroscience Institute

Specialty: Diagnostic Radiology

Clinical Interest: Neuroradiology

Clinical Appointments

  • Senior Consultant Neuroradiology National Neuroscience InstituteNational Neuroscience Institute


Prof Tchoyoson Lim (MBBS, FRCR, MMed Diagnostic Radiology), is Senior Consultant diagnostic clinical neuroradiologists and Adjunct Professor at Duke-NUS Graduate Medical School. He graduated from National University of Singapore in 1988, was awarded Fellowship of the Royal College of Radiologists, UK and Master of Medicine (Diagnostic Radiology) NUS in 1995, and was Visiting Fellow at the University of California at San Francisco.

He has co-authored 100 manuscripts and 6 book chapters, on clinical neuroimaging research using CT and MR imaging techniques. Prof Lim has held various research grants and patents, sits on journal editorial boards and reviews for research grants and medical ethics IRB.

Prof Lim holds/has held portfolios including Academic Vice-Chairs of Education and Research in Duke-NUS SingHealth Radiology ACP, Secretary of the Singapore Radiological Society, President of the College of Radiologists Singapore, Chief Examiner, Diagnostic Radiology, Deputy Chief Examiner of Royal College of Radiologists/Master of Medicine (Diagnostic Radiology), various External Examiners and Visiting Professors. Prof Lim is Core Faculty, Member of Residency Advisory Committee, Course Director Advanced Neuroradiology Course, Faculty FRCR Preparatory Course, has co-mentored 2 PhD students and won several teaching awards.


  • Master of Medicine (Singapore), 1995
  • Fellow, Royal College of Radiologists (United Kingdom), 1995
  • MBBS National University of Singapore, 1988

Professional Appointments and Committee Memberships

  • Senior Consultant, Department of Neuroradiology, National Neuroscience Institute
  • Visiting Consultant, Department of Diagnostic & Interventional Imaging, KK Women’s and Children’s Hospital
  • Visiting Consultant, Department of Rehabilitation Medicine, Tan Tock Seng Hospital
  • ​Professor, Duke-NUS Medical School
  • Academic Vice Chair Education, SingHealth Radiological Sciences, ACP
  • Visiting Professor, Diagnostic Radiology, Zhejiang Chinese Medical University, Hangzhou, 2014 – Present
  • Member, SingHealth Cluster Teleradiology Committee, 2009 – 2011
  • Chairman, NNI 10th Anniversary Committee, 2009
  • Visiting Professor, Diagnostic Radiology, Huashan Hospital Fudan University Shanghai, 2008 – Present
  • Co-chairman, NNI Research Committee, 2007 – 2008
  • Member, Specialist Review Panel, National Medical Research Council (NMRC), 2007
  • Member, NNI Teleradiology Workgroup. 2006 – Present
  • Research Co-ordinator, College of Radiologists Singapore, 2006
  • Member, Specialist Panel, Workmen’s Compensation Medical Board, MOH, 2006
  • Member, Chapter Diag Radiol, College of Radiologists Singapore, 2004 – Present
  • Member, NHG Domain Specific Review Board, 2004 – Present
  • Adjunct Assoc Professor, Yong Loo Lin School of Medicine, NUS, 2004 – 2010
  • Member, MOH National Committee of Neuroscience, 2004 – 2006
  • Secretary, Singapore Radiological Society, 2004 – 2005
  • Member, NNI Research Faculty, 2003
  • Member, MOH Clinical Practice Guidelines (Stroke) Committee, 2003 – Present
  • Chairman, NNI Corporate Video Committee, 2000
  • Member, NNI Web Committee, 2000
  • Co-ordinator, NNI PACS Program, 1999 – Present
  • Editorial Board, NNI NeusLink Newsletter, 1999 – 2003


  • Faculty Appreciation Award – Residency in SingHealth Excels (RISE) Awards, 2015
  • Long Service Award – National Day Awards 2015, 2015
  • Yong Loo Lin School of Medicine NUS Dean’s Award for Teaching, 2014
  • NHG Outstanding Education Partners Award, 2014
  • DRSB Long Service Award, 2014
  • Best Poster (as co-author) – 7th Asian Oceanian Congress of Neuroradiology (AOCNR)-Bali, 2009
  • President’s Award Most Outstanding Proferred Paper (as co-author) – SMRT 17th Annual Meeting-Canada, 2008
  • Young Investigator Award (as co-author) – 13th Scientific Meeting International Soc of Mag Reson in Medicine-Miami Beach, 2005
  • Best Scientific Paper – Bronze Award (as co-author) – 12th Congress of ASEAN Association of Radiology-Penang, 2004
  • Best Poster (as co-author) – 13th Annual Scientific Meeting, Singapore Radiological Society, 2004
  • Best Scientific Paper – 11th Congress of ASEAN Association of Radiology-Bali, 2002
  • Best Poster – 1st NHG Scientific Congress, 2002
  • Best Scientific Paper – 10th Congress of ASEAN Association of Radiology-Bangkok, 2000
  • HMDP Fellowship for Medical Staff – MOH, 1998
  • HMDP Fellowship for Master of Medicine – MOH, 1995
  • President’s Scholarship – Singapore Government, 1983

Research Interests

  • Neuroimaging
  • NIID/Dementia
  • CNS Infection
  • Artificial Intelligence
  • Computers in Radiology Education/Assessment
  • Global Health


  • Images in clinical medicine. Pendular nystagmus and palatomyoclonus from hypertrophic olivary degeneration.  Lim CC Tchoyoson, Lim Su Ann.  The New England journal of medicine 2009 Feb 26:360(9):e12.
  • An unusual outbreak of hypoglycemia. Kao SL, Chan CL, Tan B, Lim CC, Dalan R, Gardner D, Pratt E, Lee M, Lee KO. N Engl J Med 2009:360(7):734-6.
  • Embolic stroke associated with injection of buprenorphine tablets. Lim CC Tchoyoson, Lee Sze Haur, Wong Yee-Choon, Hui Francis.  Neurology 2009:73(11):876-899. 
  • Acute symptomatic seizures and hippocampus damage: DWI and MRS findings.  Parmar Hemant; Lim Shih-Hui, Tan Nigel CK, Lim CC Tchoyoson.  Neurology 2006; 66(11):1732-1555.
  • Territorial arterial spin labeling in the assessment of collateral circulation: comparison with digital subtraction angiography.  Chng Soke Miang, Petersen Esben Thade, Zimine Ivan, Sitoh Yih-Yian, Lim CC Tchoyoson, Golay Xavier.  Stroke; a journal of cerebral circulation 2008:39(12):3248-3545.
  • Cerebral perfusion mapping using a robust and efficient method for deconvolution analysis of dynamic contrast-enhanced images. Koh TS, Tan CK Markus, Cheong LH Dennis, Lim CC Tchoyoson.  NeuroImage 2006:32(2):643-653.
  • A distributed parameter model of cerebral blood-tissue exchange with account of capillary transit time distribution.  Koh TS, Cheong LH Dennis, Tan CK Markus, Lim CC Tchoyoson.  NeuroImage 2006:30(2):426-435.
  • Severe hypoglycemia associated with an illegal sexual enhancement product adulterated with glibenclamide: MR imaging findings.  Lim C C Tchoyoson, Gan Robert, Chan Cheng Leng, Tan Alvin WK, Khoo Joan JC, Chia Su-Ynn, Kao Shih Ling, Abisheganaden John, Sitoh YY.  Radiology 2009:250(1):193-201.
  • Dynamic Contrast-enhanced CT of Intracranial Meningioma: Comparison of Distributed and Compartmental Tracer Kinetic Models—Initial Results.  LH Dennis Cheong, CC Tchoyoson Lim, Tong San Koh.  Radiology 2004:232(3).
  • Lim CC Tchoyoson, Lee Kim En, Lee Wei Ling, Tambyah Paul A, Lee Cheng Chuan, Sitoh Yih Yian, Auchus Alexandra P, Lin B K Michael, Hui Francis.  Nipah virus encephalitis: serial MR study of an emerging disease.  Radiology 2002:222(1):219-226

Research Trials

  • MR Perfusion: Improving Quantitative Imaging Based Biomarkers of Tumoral Microvasculature Using Combined Dynamic Contrast Enhanced, 2007
  • Radiology and Follow Up in Buprenorphine and Drug Abuse, 2007
  • Using Dynamic Contrast Enhanced CT Perfusion (CTP) to Predict and Measure Response to Radiation Therapy for Cerebral Metastases, 2008
  • Drug-induced Hypoglycaemia – Effects on the Brain, 2009