Biopsies are currently used to diagnose bowel cancer but require an invasive procedure that offers risks, such as potential infection, and are unable to capture an entire picture of what is happening in a patient's bowel. PET scanning creates a three-dimensional picture of the inside of the body using labeled nutrients, or drugs known as a tracer, to show up areas where cells are more active than normal. positron emission tomography (PET) imaging could allow the