ABSTRACT
IDENTIFY from Varian Medical Systems is a surface image guidance system for patient and accessory setup, interfraction positioning, and intrafraction patient motion management. It is used during CT simulation and radiation therapy. Using Time-of-Flight camera technology, IDENTIFY can assist therapists in initial accessory placement and patient setup at loading position. Stereo vision cameras compute a live 3D mesh of the patient's surface, calculating offsets from the planned position. The rotational and translational offsets are displayed in virtual reality as a color gradient overlaid onto a live video feed of the patient, indicating posture changes needed to bring the patient into alignment. During treatment, if the patient's position deviated from predefined offset thresholds, the beam can be automatically turned off. IDENTIFY can be used for setup and delivery of stereotactic radiosurgery, conventional radiation therapy, and breath-hold respiratory management. This chapter provides a technical overview and description of key features in the IDENTIFY technology, introducing hardware components, clinical workflows, and calibration procedures.
