Figure 7.

Prostate shift is identified by the Clarity Autoscan ultrasound system. The Clarity Autoscan ultrasound system shows an anterior prostate shift of 1 cm. The red prostate contour (solid line) has moved anterior to the zero position (red dotted line) by 1 cm as noted in the lower panel and maintains this position over several minutes. The red contour is contoured during the planning process on the planning computed tomography (CT) and transferred to the ultrasound (US) image during the registration of the 2 images in the Clarity system. On the first treatment, the contour is imported into the monitoring system.