Patent ID: 7413539

Claim:
A device for irradiating a cavity within a patient from which tissue has been removed to treat tissue which surrounds the cavity, comprising: a.) an elongate shaft having a proximal end, a distal end, a treatment location at a distal portion of the shaft, the distal portion of the shaft being configured to be deployed within the body cavity; b.) a radiation source configured to be disposed in the treatment location and to irradiate tissue surrounding the body cavity; and c.) a radiation shielding component having a first shielding portion which has proximal and distal ends and which is configured to partially shield the radiation source when deployed within the treatment location in order absorb part of the radiation emitted from the radiation source to thereby protect a portion of the tissue surrounding the cavity shielded by the first radiation shielding portion and to allow irradiation treatment of tissue surrounding the cavity which is not shielded by the shielding component and a second tubular radiation shielding portion at one end of the shielding component; and d.) a cavity filling member surrounding the treatment location so as to space the radiation source within the cavity.