Millennium's drug, now in early human trials, homes in on prostate cancer cells and aims to obliterate them with a precise dose of toxic chemotherapy while leaving surrounding tissue untouched.

FORBES: Men, Cancer & Hope

This allows doctors to boost the dose at the core of the tumor while giving lower doses at the edges, preserving healthy tissue.

FORBES: Men, Cancer & Hope

Conventional CT scans are used to work out the shape of the place where a dose of radiation needs to be concentrated in order to attack a tumour without damaging nearby healthy tissue.

ECONOMIST: Modern X-ray technology