Drs Ryan Choi, Sisith Ariyaratne, and Tzen Koh become Practice Partners

1 July 2025

Benson Radiology is delighted to announce the appointments of Drs Ryan Choi, Sisith Ariyaratne, and Tzen Koh as Practice Partners. 

Dr Ryan Choi joined the Practice in August 2021. Having graduated from medical school at UNSW, Sydney, Ryan underwent his radiology training locally here in South Australia. His areas of interest include MRI, body imaging and oncology imaging. Ryan holds a Staff Specialist position at the Royal Adelaide Hospital and is actively involved in Registrar training and several multidisciplinary meetings.

After achieving his medical degree with Honours from Monash University, Dr Sisith Ariyaratne joined Benson Radiology in September 2021. He has subspecialty training in musculoskeletal imaging, having completed a fellowship at the Royal Orthopaedic Hospital in Birmingham. With an interest in musculoskeletal and neuro imaging, Sisith has published several papers in peer-reviewed scientific journals including Skeletal Radiology and the British Journal of Radiology. 

Dr Tzen Koh is a dual-qualified Radiologist and Nuclear Medicine Specialist with a subspecialty interest in oncology. He joined Benson Radiology in February 2021 after graduating from the University of Melbourne Medical School with Honours. Tzen and brings extensive experience and placements including post-fellowship training at the Peter MacCallum Cancer Centre, Melbourne, together with various published articles and research projects – both here and overseas.