Uncertainties estimation in the ultrasound CMS-I beam image prostate localization

Organ motion is an issue of major concern when dose escalation techniques in radiotherapy such as IMRT are considered. Patient and organ motion can be better account for by means of Image-Guided Radiotherapy (IGRT), allowing for a reduction of margins to the CTV. Ultrasound images have been used for prostate localization. The aim of the present work is to evaluate the uncertainties of the newly developed ultrasound-based system CMS I-BEAM for daily prostate localization in radiotherapy. (Author)