The treatment of brain aneurysms could be transformed by a software platform powered by artificial intelligence. Researchers found the programme, called PreSize, was more accurate placing a stent than experienced neurosurgeons. An aneurysm is a weak or thin spot on a vessel wall in the brain that fills with blood - and they can be life threatening if they burst. A stent is a mesh tube which springs open to divert blood flow, avoiding extra pressure that could cause the aneurysm to rupture. The blood should then eventually clot and dissolve. However, there's currently a "lot of guesswork" in placing the stent, said Dr Katerina Spranger - founder of Oxford Heartbeat, the firm behind PreSize. "If the device is for example, undersized, it can detach from the blood vessels and start travelling around the circulatory system of the body, which is huge complication," said Dr Spranger.