ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Prostate cancer radiotherapy surgery. Radiologist inserting a hollow needle through a template grid (black square) and through a patient's perineal skin, during a treatment for prostate cancer. The device below the surgeon's hand is a trans-rectal ultrasound probe that has been inserted into the patient's rectum to guide the needle to the prostate gland. The needles are used to implant radioactive sources. This type of treatment is known as brachytherapy, and is a form of radiotherapy. The radiation kills the cancerous cells.
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