Patent ID: 8057379

Claim:
A method for treating a cavity of a patient's body, comprising: a.) providing a device having an elongate shaft with a proximal end, a distal end, a treatment location at a distal portion of the shaft and a cavity filling member surrounding the treatment location which has a tissue contacting exterior surface; b.) providing a radiation shielding component which is configured to control at least in part the emission of radiation emitted from a radiation source within the treatment location; c.) inserting the device into the patient's body and advancing the device through a passageway therein until the cavity filling member is disposed within the cavity; d.) applying a vacuum within the cavity to conform tissue surrounding the cavity to the tissue contacting exterior surface of the cavity filling member; e.) positioning advancing the radiation source through the elongated shaft until the source is disposed within the treatment location; and f.) adjusting the position of the radiation shielding component within the treatment location to shield portions of the tissue surrounding the cavity from radiation emitted from the radiation source.