Our Doctors

Dr Looi Wenshen

MBBS (SIN), FRCR (Clinical Oncology, UK), FAMS (Radiation Oncology)

Consultant Radiation Oncologist
Proton Therapy SG
Singapore Institute of Advanced Medicine

Visiting Consultant Radiation Oncologist
KK Women’s and Children’s Hospital, Singapore

Visiting Consultant Radiation Oncologist
National Cancer Centre Singapore

Conditions Treated:

General radiation oncology with subspecialty interest in urologic cancers (prostate cancer, kidney cancer); sarcomas; skin cancer; lymphomas; liver cancer; head and neck cancers; subspecialty training in UFPTI for adult and paediatric proton therapy.

Contact:

Enquiries: WhatsApp +65 9297 5542 or email wenshen.looi@proton.sg.

Biography:

Dr Looi Wen Shen is a radiation oncologist at Proton Therapy SG, Singapore Institute of Advanced Medicine. He graduated from Yong Loo Lin School of Medicine, National University of Singapore in 2008, and went on to complete his residency training in National Cancer Centre Singapore (NCCS), before receiving specialist accreditation in radiation oncology by the Specialist Accreditation Board. He worked as a Consultant in the Division of Radiation Oncology, National Cancer Centre Singapore; Clinical Assistant Professor in Duke-NUS medical school; and Clinical Teacher in the Lee Kong Chian School of Medicine. During his time in public service in NCCS, Dr Looi oversaw the creation of a comprehensive paediatric radiation oncology program that integrated allied healthcare to improve patient satisfaction and experience. As an educator to the younger generation of doctors, Dr Looi obtained a certificate for Essential Skills in Medical Education (ESME) for this.

Dr Looi is a radiation oncologist with practical overseas experience in proton therapy, having practised at the University of Florida Proton Therapy Institute, USA, where he completed subspecialty fellowship training in proton therapy and paediatric radiotherapy as an Adjunct Clinical Post-Doctoral Associate. He also received further proton therapy training at the Taiwan Medical University Hospital Proton Centre for regionally endemic diseases such as liver cancer and nasopharyngeal cancer. He is adept at 3D conformal radiotherapy (3DCRT), intensity modulated radiotherapy (IMRT), volumetric modulated arc therapy (VMAT), stereotactic body radiotherapy (SBRT), and intensity modulated proton therapy (IMPT).

Dr Looi is proud to have been able to kick start the paediatric proton program at National Cancer Centre Singapore. Today, Dr Looi continues to contribute to public healthcare as a Visiting Consultant in KK Women’s and Children’s Hospital and National Cancer Centre Singapore. Dr Looi is one of the few regional radiation oncologist members of the Children’s Oncology Group (COG). Additionally, he is listed in the Chordoma Foundation Directory (Wen Shen Looi). He is also a member of several other professional societies including the American Society for Radiation Oncology (ASTRO), Academy of Medicine, Singapore (AMS), Royal College of Radiology (RCR) (UK), Children’s Cancer and Leukaemia Group (CCLG) (UK), and the Paediatric Radiation Oncology Society (PROS).

While in NCCS, his research was published in journals such as the International Journal of Radiation Oncology Biology and Physics, and Medical Physics, Pediatric Blood and Cancer, and the Archives of Disease in Childhood. Through his research, Dr Looi endeavours to decrease the acute and late side effects of radiation in patients, thus improving their quality of life. Dr Looi will continue his research in the Singapore Institute of Advanced Medicine (SAM), focusing on the clinical outcomes of proton therapy. SAM’s plans for incorporation of FLASH proton therapy will also add an exciting dimension to the local proton research and clinical scene.

Previous Grants:

  • Development of a Virtual/Mixed Reality Proton Gantry Room prototype to aid paediatric patient counselling, FY2021.
  • Kids, adolescent and young adult (KAYA) electronic patient-reported outcomes for Quality of Life metric measurements following radiotherapy, FY2023.
  • Improving comfort in Kids, Adolescent and Young adults during radiotherapy: Open-face masks in paediatric patients for immobilisation, FY2023.

Publications:

Please see Google Scholar

Dr Shaun Ho Zhirui

MBBS, FRCR (Clinical Oncology), MRCS, GDPM, FAMS

Consultant Radiation Oncologist

Biography:

Dr. Shaun Ho is an experienced senior radiation oncologist at Proton Therapy Singapore. He specialises in the use of advanced radiotherapy techniques to improve patient outcomes while minimizing treatment side effects. This encompasses proton beam therapy (PBT), stereotactic body radiotherapy (SBRT), stereotactic radiosurgery (SRS), as well as intensity modulated/volumetric modulated arc radiotherapy (IMRT/VMAT).

Prior to joining Proton Therapy Singapore, Dr. Ho was the head and Clinical Director of Radiation Oncology at Raffles Hospital. He also previously served as a Consultant and Clinical Assistant Professor at the National Cancer Centre Singapore (NCCS) and Duke-NUS Graduate Medical School.

Dr. Ho is an MOH accredited specialist in Radiation Oncology and a Fellow of the Academy of Medicine Singapore. He is also a Fellow of the UK Royal College of Radiologists (Clinical Oncology) and a Member of the Royal College of Surgeons of Edinburgh. Additionally, he holds a Graduate Diploma in Palliative Medicine.

He underwent radiation oncology residency at NCCS and subsequently completed a fellowship in Clinical Oncology at University College London Hospital (UCLH) in the UK. During his fellowship, he treated patients at UCH Macmillan Cancer Centre, the National Hospital for Neurology and Neurosurgery (NHNN), and was part of the London Sarcoma Service, one of the largest sarcoma services in Europe. His subspecialty training was in gastrointestinal oncology, neuro-oncology, sarcomas and lymphomas. He also underwent further training in proton beam therapy (PBT) at Kobe Proton Therapy Center in Japan, and at Taipei Medical University in Taiwan.

Dr. Ho served as a Consultant Radiation Oncologist at the National Cancer Centre Singapore (NCCS), specialising in gastrointestinal oncology, sarcomas, and lymphomas. During his time in public service, he received the SingHealth 10-year long service award in recognition of his contributions to patient care.

In 2020, Dr. Ho took on the role of Clinical Director of Radiation Oncology Services at Raffles Hospital. There, he established and operationalised their first radiotherapy services, which included techniques such as Stereotactic Body Radiotherapy (SBRT) for lung and bone tumours, Stereotactic Radiosurgery (SRS) for brain metastases, Deep Inspiratory Breath-hold (DIBH) Radiotherapy for breast cancer, and Volumetric Modulated Arc Therapy (VMAT) for cancers in the head and neck, lung, and prostate.

To advance the radiation oncology specialty in Singapore, Dr. Ho served on the Executive Committees of the Chapter of Radiation Oncologists, College of Radiologists Singapore, and the Singapore Radiological Society. He is also a member of the International Society for Radiosurgery.

Dr Wong Ru Xin

MBBS (Singapore), FRCR (Clinical Oncology)

Senior consultant 

Singapore Institute of Advanced Medicine Holdings

Radiation Oncologist

Biography:

Dr Wong Ru Xin graduated from the National University of Singapore on the Dean’s list in 2009 and started residency training shortly after. Soon after, she became a Fellow of the Royal College of Radiologist (UK) (clinical oncology). Dr Wong worked at the National Cancer Center of Singapore for more than 10 years before leaving for private practice. As part of her training in proton therapy, she received the Ministry of Health Manpower Development Program to spend time at St. Jude Children’s Research Hospital and observed at Provision Cares Proton Center, and Kobe Proton Center.

Her practice includes radiation therapy technology and the treatment of breast, head and neck, paediatric, brain, skin cancer and sarcoma. Dr Wong is skilled in the use of electrons, 3D, IGRT, VMAT, SBRT and Proton Beam Therapy in treating cancer. She has attended relevant courses like Winter School in Particle Therapy, ESTRO Particle Therapy, ESTRO Radiobiology and physics, ESTRO lung, ESTRO Head and Neck, and ESTRO Stereotactic Radiosurgery.

Dr Wong was the principal investigator in a few clinical trials and studies while in public institutions. She also taught medical students and residents and continues to teach oncology nurses. She has organised various webinars and symposiums in the past for local and international faculty.

Dr Wong has published local and regional papers on cancer prognostication, outcomes, and using novel techniques. Dr Wong concluded a clinical trial using hypo-fractionated radiotherapy in sarcomas. She also received grants to implement open-faced masks and silicon grip rings for patient comfort, electronic patient-reported outcomes, and study repeat MRI for adaptive radiotherapy in intracranial malignancies. While in National Cancer Center Singapore, she implemented new clinical technologies like pulsed low dose rate radiotherapy and collaborated with her colleagues to implement paediatric interstitial brachytherapy for rhabdomyosarcoma.

Dr Wong hopes to bring proton and advanced photon radiotherapy to Singapore and the region. Dr Wong is leveraging SAM network on the FLASH therapy consortium and A*STAR to investigate new technologies. She continues to serve the public as a visiting consultant in NCC Singapore and KK Hospital.

Memberships & Affiliates:

  1. Singapore Radiological Society (SRS)
  2. Royal College of Radiologists UK (FRCR)
  3. Southeast Asia Radiation Oncology Group (SEAROG)
  4. European Society Radiation Oncology ( ESTRO)
  5. Pediatric Radiation Oncology Society (PROS)

Awards & Honours:

Dean’s list 2009 NUS

ENT book prize, General surgery book prize

Human Manpower Development Program 2018

Long service award (10 years) Singhealth

Singhealth-Duke NUS Academic Research Grant 2021, 2022