This is great news - prostate cancer is one of the most common cancers and the treatment that it requires can lead to some horrible side effects for men.
Any technology that helps direct that treatment only to where it is most required is to be commended.
The trial, at 11 hospitals in the UK, used multi-parametric MRI on men with high PSA levels. It showed 27% of the men did not need a biopsy at all. And 93% of aggressive cancers were detected by using the MRI scan to guide the biopsy compared with just 48% when the biopsy was done at random. Dr Ahmed, who works at University College London Hospitals, told the BBC News website: "This is a significant step-change in the way we diagnose prostate cancer. "We have to look at the long-term survival, but in my opinion by improving the detection of important cancers that are currently missed we could see a considerable impact.