Prostate cancer radiotherapy scanning. Radiologist looking at an ultrasound screen while lining up a trans-rectal ultrasound probe (not seen) that is being used to image the prostate of a patient being treated for prostate cancer. This stage of the process, known as a volume study, creates a three-dimensional image of the prostate to aid planning of the next stage. Radioactive sources are then implanted in the tissue in a procedure known as brachytherapy, a form of radiotherapy. The radiation kills the cancerous cells.
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