Patent ID: 8669541
Filing Date: 2014-03-11
Classification: A61N

Abstract:
1. An apparatus for treatment planning for delivering a biological dose at a treatment site of a patient, the apparatus comprising: a first component to determine a variability of relative biological effectiveness (RBE) along a line of a plurality of hadron beams, wherein RBE is a ratio of a dose of reference radiation to a hadron dose required to achieve an equivalent biological effect; a second component to calculate RBE values at a plurality of sections of a spread-out Bragg peak (SOBP) associated with the treatment site, taking into account the determined variability from the first component; and wherein the plurality of sections include: a declining distal edge area of the SOBP and at least one of: a proximal area of the SOBP, a distal area of the SOBP, a pre-plateau area of the SOBP, and wherein the calculated biological dose distributions superimpose for providing a desired biological dose at the treatment site.