Patent ID: 6463122
Filing Date: 2002-10-08
Classification: A61B,A61N

Abstract:
A method of irradiating a tumor within a living subject, such method comprising the steps of:locating the tumor within the living subject lying face-down on a patient platen; during a first time period moving a radiation source around the located tumor along a predetermined locus of points having a varying distance between the radiation source and the tumor and where the predetermined locus of points lie substantially in a horizontal plane; steering a radiation beam of the radiation source to irradiate the tumor from each point of the predetermined locus of points during the first time period, where such steering allows the radiation beam to irradiate the tumor without the tumor being located at an isocenter of the locus of points; tilting the locus of points during a second time period so that the locus of points lies in a second plane different from the horizontal plane; and steering the radiation beam of the radiation source to irradiate the tumor from each point of the tilted locus of points during the second time period, where such steering allows the radiation beam to irradiate the tumor without the tumor being located at an isocenter of the locus of points.