Stereotactic multiple arc radiotherapy

A radiotherapy technique is presented for delivering a concentrated pattern of absorbed dose to intracranial lesions. Treatment takes place on a conventional, isocentrically mounted linear accelerator, rotated in several planes around a single target site. A new, relocatable sterotactic frame is used which enables fractionated radiotherapy to be administered. Calculations of absorbed dose distribution in three orthogonal planes are performed using specially prepared software on a computer used for standard treatment planning. In this way, the need for excessive computing power is avoided. (author)