Patent ID: 8241317

Claim:
A prostate immobilizing rectal balloon, said rectal balloon comprising: a. a flexible shaft having a fluid passageway extending therethrough and having a distal end and a proximal end, b. one balloon having an upper portion, a bottom portion, a distal end near said distal end of said shaft and a proximal end that is affixed to said shaft, such that said fluid passageway communicates with an interior of said balloon, c. wherein said balloon comprises a top layer, a middle layer and a bottom layer, said layers bonded together along their edges to form said balloon, d. wherein said middle layer is connected to said top layer at a groove, e. wherein said balloon has a non-inflated position, f. wherein said balloon has an inflated position wherein said upper portion is generally laterally flat and said bottom portion is rounded, said groove forming a central seating area that is configured to engage with a prostate when inflated.