 The IAEA is coordinating an international research project to improve radiation treatment for inoperable cancers. There are many different types of radiotherapy. These all use high energy waves to kill cancer cells. Choosing a type of radiotherapy depends on many factors, including the cancer's type, the size and location, and the patient's age and health. Stereotactic Body Radiation Therapy, or SB-RT, is a cutting-edge approach that attacks a tumour from many sides while reducing damage to surrounding tissue. However, it has been mainly limited to treating small cancers, or those in the brain. But new trials, including one run by the IAEA, are providing early evidence that doctors could expand its use to liver cancer, which is often found too deep in the organ to cut out. These trials and other agency projects are also helping to build capacity. SB-RT has a huge potential that is largely untapped, especially in liver, so I think that there's a potential for new treatments being developed and new cancers being treated. Since it's a relatively complex procedure, it needs specific training, and through this research trial, we're able to train the physicians and the physicists to be able to implement these techniques. The IAEA has brought a team of international experts together to design the study and recruit eligible consenting patients from hospitals around the world, including the renowned Tato Memorial Hospital in India. Stereotactic Radiation is known to be as precise and effective as a surgical knife in many types of cancer, and right now, we are testing its performance for inoperable liver cancer. So despite the crowds and commotion outside, in this room, everything is calm, precise and controlled, allowing doctors to target the tumours with millimetre accuracy. Patients who take part in the trial would otherwise only have a few months to live and hope that this therapy will buy them some valuable time. I have a small daughter. She's six years old now. Now, I thought that she won't have any memory of me if I die now, and she won't even know that how much I love her. So I have to fight for her to remember that, yes, father was that, and father was this, and father loved me this much. That's what, you know, keeps me going. This advanced form of radiation therapy is possible because of improvements in medical imaging, which allow a doctor to map out the exact contours of a tumour and use this 3D outline to shape radiation beams. The patients undergo training to use sensors to monitor and control their breathing and then lie on custom-made body moulds to further minimise any movement during treatment. The machine revolves around the patient so the radiation beams enter the body from different directions to reach the tumour. This combined with precise targeting and immobilisation means the beams are less likely to damage the tissues nearby, so the doctors can deliver much higher doses of radiation. This makes treatment faster and more effective with less side effects. Data for the trial will be gathered from South Korea, Egypt, India and China, among others. The doctors involved hope to collect strong evidence about SBRT's potential to treat liver cancer, which will eventually be published and presented internationally. I'm hopeful that within the next three to five years we will have robust evidence for the utility and efficacy of stereotactic body radiotherapy for liver cancer.