Once cancer is diagnosed and deemed treatable, it is the job of a medical physicist to plan the patient's radiation treatment. In the case of breast cancer, the objective is to maximise radiation to the tumour in the breast, but minimise radiation to surrounding areas, such as the lung. Kavuma Awosi, medical physicist at Mulago Hospital uses machines to measure the tumours from every angle so he can pinpoint where radiation should be targeted and calculate how much radiation should be allowed to hit the body and for how long.