Meet our expert radiologists.

Dr. Gayani Arachchi returned to New Zealand from Melbourne in 2023 and works across Bay Radiology and Tauranga Hospital. She has expertise in colorectal and genitourinary imaging, along with musculoskeletal and breast imaging, including interventional procedures.

Sub-Specialisations:

• Colorectal and Genitourinary Imaging
• Musculoskeletal Imaging
• Breast Imaging
• Intervention

Education and Training:

• Graduated from the University of Auckland.
• Completed radiology training in Tauranga and Auckland.
• Completed fellowships in Breast Imaging with BreastScreen Aotearoa, Musculoskeletal Radiology at Auckland City Hospital, and Oncology Imaging in Melbourne, Australia.

Dr. Richard Downing completed his medical training at the University of Otago. He undertook his radiology training in Palmerston North and Auckland and was awarded FRANZCR in 2013.After gaining extensive experience both overseas and in New Zealand, Richard joined Bay Radiology and Tauranga Hospital in 2022. He has subspecialist interests in neuroradiology, head, neck and musculoskeletal imaging.

Sub-Specialisations:

• Neuroradiology
• Head, neck and musculoskeletal imaging.

Education and Training:

• Graduated from the University of Otago.
• Completed radiology training in Palmerston North and Auckland.

Dr Tim Guest joined Bay Radiology in September 2025. He undertook sub-specialist training in gastrointestinal radiology in the UK, where he worked as an abdominal radiologist for five years. His interests include abdominal MRI, multi-modality bowel imaging and gastrointestinal fluoroscopy.

Sub-Specialisations:

• Gastro-Intestinal Radiology
• Body Imaging

Education and Training:

• Graduated from Norwich Medical School, UK
• Completed radiology training in the Yorkshire School of Radiology, UK
  

Dr. Gracie Keown completed her medical training at the University of Auckland in 2011 and her radiology training in Tauranga and Auckland. She completed a breast imaging fellowship with BreastScreen Aotearoa in 2019 and a diagnostic neuroradiology fellowship in Perth in 2022-2023. In 2024, Gracie returned to Tauranga and joined Bay Radiology and Tauranga Hospital. She specialises in neuroradiology and breast imaging.

Sub-Specialisations:

• Neuroradiology
• Breast Imaging

Education and Training:

• Graduated from the University of Auckland.
• Completed radiology training in Tauranga and Auckland.
• Completed fellowships in breast imaging with BreastScreen Aotearoa, and diagnostic Neuroradiology in Perth, Australia.

Dr. Louise Moore joined Bay Radiology in 2006 as a Consultant Radiologist. She completed sub-specialist gastrointestinal radiology training at St. Mark’s Hospital London. Before relocating to Tauranga, she worked at Chelsea and Westminster Hospital in London as an abdominal radiologist. Louise's interests include abdominal MRI, bowel imaging techniques and pelvic floor imaging.

Sub-Specialisations:

• Body Imaging
• Women's Health

Education and Training:

• Graduated from the University of Otago.
• Completed radiology training in Palmerston North, Auckland and London.

Dr. Sharath Prakash joined the Bay Radiology team in 2014. His sub-specialty interests include neuroradiology, head and neck and breast imaging.

Sub-Specialisations:

• Breast Imaging
• Neuroradiology
• Musculoskeletal Intervention

Education and Training:

• Completed medical training in India.
• Completed radiology training in Tauranga and Auckland.

Dr. Amanda Ragg has been part of the Bay Radiology team since 2001. She trained at Auckland University completing both science and medical degrees, and completed her radiology training in Auckland after two years as a house surgeon in Tauranga. She leads the weekly multidisciplinary meetings in orthopaedic and paediatric imaging, and has a particular interest in musculoskeletal MRI. 

Sub-Specialisations:

• Musculoskeletal Imaging

Education and Training:

• Graduated from the University of Auckland.
• Completed radiology training in Auckland.
• Completed a musculoskeletal radiology fellowship.

Dr. Duncan Wood joined Bay Radiology in 1998, following his specialist radiology training after studying at the University of Otago. He is the Clinical Director of BreastScreen Bay of Plenty, and has particular interests in musculoskeletal imaging and interventional radiology.

Sub-Specialisations:

• Breast Imaging
• Interventional procedures
• Musculoskeletal Intervention

Education and Training:

• Graduated from the University of Otago.
• Completed radiology training.