Online ultrasound image guidance for radiotherapy of prostate cancer: impact of image acquisition on prostate displacement.

Aim: Numerous studies reported the use of ultrasound image-guidance system to assess and correct patient setup during radiotherapy for prostate cancer. We conducted a study to demonstrate and quantify prostate displacement resulting from pressure of the probe on the abdomen during transabdominal ultrasound image acquisition for prostate localization.

Material And Methods: Ten healthy volunteers were asked to undergo one imaging procedure.