Patent ID: 7726318

Claim:
A method of delivering differentiated doses of ionizing radiation to adjacent regions of patient anatomy during brachytherapy performed with an applicator positioned within a cavity of the patient, comprising: providing a set of flexible generally sheet-like spacer devices having a series of different thicknesses, selecting from the set of spacer devices having a series of different thicknesses, a spacer device of desired thickness, the spacer device being a substantially flexible structure which is biocompatible, placing the selected spacer device so as to be positioned between the applicator containing a radiation source and an area of patient anatomy, within the cavity of the patient's tissue, and irradiating the patient's tissue using the radiation source, with the spacer device holding said area of patient anatomy at a desired spacing away from the applicator and thus away from the radiation source, such that radiation received by said area of patient anatomy is attenuated by increased distance from the source.