Key points from article :
Highly targeted form of radiotherapy shapes radiation beams to tumours.
When prostate cancer has spread to the pelvis conventional radiotherapy becomes too risky.
Intensity modulated radiotherapy (IMRT) able to give a high dose of radiation with fewer side-effects.
71 % of patients disease free five years after treatment.
Could help around 3,000 men a year who otherwise had little hope.
Prostate cancer is the most common form of cancer in UK men with 47,000 diagnoses a year.
