Investigation of a stereoscopic camera system for gated radiotherapy

Abstract

Radiotherapy is a treatment method, where high precision for tumour localization is needed. Respiratory motion of the patient has to be taken into account. In this work, the first steps to implement a clinical 4D workflow in a phantom are presented. Using the breathing information recorded with a stereoscopic camera system from a breathing cardiopulmonary resuscitation (CPR) mannequin, 4-Dimensional computed tomographies (4DCTs) can be acquired. Also, a second respiration curve was recorded simultaneously using a belt around the abdomen of the mannequin, which currently is the standard procedure to acquire 4DCTs. A state-of-the-art lineal accelerator was successfully gated using the software of the stereoscopic cameras. Nevertheless a more complex phantom is needed to perform the geometrical and dosimetrical measurements. © 2009 Springer-Verlag.