SYSTEM AND METHOD FOR FRAMELESS STEREOTACTIC RADIOSURGERY OF ARTERIOVENOUS MALFORMATIONS

摘要

A system and method for frameless stereotactic radiosurgery of arteriovenous malformations ("AVMs") are provided. In particular, digital subtraction angiography ("DSA") is utilized to obtain two-dimensional angiograms depicting the location and extent of a nidus of an AVM in a patient. Without using an invasive stereotactic frame affixed to the patient, the location and extent of the nidus is transformed into three- dimensional coordinates that can be registered with an x-ray computed tomography ("CT"] image volume of the patient. The determination of the nidus volume-of-interest ("VOI") from the two-dimensional angiograms is aided by the acquisition of radiograph images of a localizer box. These localizer radiographs are obtained with the same x-ray imaging system using same setup used to obtain the angiograms of the patient.