It utilizes stereoscopic X-ray based localization technology for high-precision non-invasive SBRT to extracranial targets. More specifically, the unit has the ability of corroborative image fusion of the digitally reconstructed image from CT simulation and orthogonal X-ray imagery taken in the treatment position. The robotic couch allows automated positioning of the patients to the best match of the stereoscopic images to the planning CT. Verification images are taken after the patient is aligned. Shifts of less than 1 mm are ignored. The unit is also equipped with a non-invasive, frameless positioning device that uses infrared, passive marker technology as well as the micromultileaf collimator for radiation intensity modulation and beam shaping. Using dynamically shaped beam, this system maximizes the dose to irregularly shaped lesions, while minimizing the dose to the surrounding normal tissues.
Note: Information gathered from the National Institutes of Health website.