Dr Gaya treats solid tumours using chemotherapy, radiotherapy and biological therapies. His main focus is on colorectal cancer, cancers of the oesophagus, stomach, pancreas and liver.
Dr Gaya’s main research interests are functional cancer imaging, where he is looking for ways to assess response to treatment much earlier, and techniques for assessing blood flow and oxygen levels within cancers. He is also interested in developing drug treatments that can cut off the blood supply to cancers, or stop cancers making new blood vessels.
He is heavily involved with the implementation of the latest radiotherapy techniques such as IMRT, IGRT and tomotherapy, and stereotactic body radiosurgery.
He has published widely in peer reviewed journals. He is a principle investigator on a number of national and international clinical trials.
Current NHS post
Guy’s and St Thomas’ NHS Trust