Patent ID: 8565378
Filing Date: 2013-10-22
Classification: A61N

Abstract:
1. A method for stereotactic, conformal radiation therapy of tumors, the method comprising the steps of: a) positioning an iris diaphragm collimator to irradiate the tumor from a first irradiation angle, the iris diaphragm having at least three diaphragm leaves, wherein the diaphragm leaves open up a beam-limiting opening such that a sliding movement along side surfaces of the diaphragm leaves takes place by a number of diaphragm leaves which is reduced by at most one; b) setting a first aperture opening of the collimator suitable for irradiation of a first region of the tumor; c) irradiating the tumor; d) translating the collimator in a direction substantially transverse to said first radiation angle to scan the tumor; e) irradiating a further region of the tumor; f) repeating steps d) and e) until a desired region of the tumor is irradiated with the first aperture size; g) setting a further aperture opening of the collimator which differs from the first aperture opening; h) repeating steps d) through g) until a desired region of the tumor is irradiated; i) positioning the iris diaphragm collimator to irradiate the tumor from a second irradiation angle which differs from the first irradiation angle; and j) repeating steps b) through i) until a desired dose of radiation has been applied to the tumor.