Patent ID: 8864681

Claim:
A biopsy apparatus comprising: a hollow, relatively flexible tube having an open proximal end and a closed distal end, wherein the tube comprises a completely solid wall extending between the open proximal end and the closed distal end; an elongate member advanceable in the tube and having a distal end, wherein the elongate member comprises at least one indicia positioned along a length of the elongate member; and at least one isotope disposed within the tube, wherein the isotope is positioned proximal to the closed distal end of the tube, such that a portion of the tube extends distally between the isotope and the closed distal end of the tube, and wherein the isotope is coupled to the elongate member at a position proximal to the distal end of the elongate member; wherein the indicia of the elongate member is configured to align with the proximal end of the tube to position the isotope at a predetermined position along a length of the tube.