Asymmetric Radiation Dosing Devices and Methods for Brachytherapy

A brachytherapy treatment device, comprising:

• at least one tubular insertion member having a longitudinal axis, a proximal end and a distal end;
• and
• an expandable member disposed on and surrounding the distal end of the at least one tubular insertion member;
• wherein the distal end of the at least one tubular insertion member within the expandable member has a substantially helical shape, the at least one helical-shaped tubular insertion member operable to receive a radiation source to position a radiation source offset with regard to the longitudinal axis to form an asymmetric radiation dosing profile.

A brachytherapy treatment device, comprising:

• at least one tubular insertion member having a proximal end, a distal end, and a radiation source lumen disposed along a longitudinal axis;
• and
• an expandable member disposed on and surrounding the distal end of the at least one tubular insertion member;
• wherein the distal end of the at least one tubular insertion member within the expandable member has proximal and distal tip segments, the proximal and distal tip segments in detachable mated engagement, wherein detaching the proximal and distal tip segments exposes the radiation source lumen of the at least one tubular insertion member to an interior volume of the expandable member, wherein the radiation source lumen is adapted to receive and position a radiation source within the interior volume of the expandable member to form an asymmetric radiation dosing profile.

A brachytherapy treatment device, comprising:

• an insertion support structure having a proximal end and a distal end;
• at least one tubular member having proximal and distal ends and sized to be received by the insertion support structure, the at least one tubular member having a radiation source lumen extending along a longitudinal axis;
• and
• an expandable member defining an internal volume, the expandable member disposed on and surrounding the distal end of the at least one tubular member;
• wherein the at least one tubular member is adapted to be independently positionable with regard to the insertion support structure, the at least one tubular insertion member deflectable within the internal volume to expose the radiation source lumen to the internal volume to form an asymmetric radiation dosing profile.

A radiation treatment device comprising:

• a tubular member having a longitudinal axis, a distal portion adapted to be inserted within a patient to a treatment site and a proximal portion adapted to extend out of the patient;
• an expandable device disposed on said distal portion of said tubular member, said expandable device configured to be expanded such that tissue conforms to an outer surface of the expandable device whereby such conforming tissue defines an inner boundary of target tissue to be treated by radiation;
• and
• a radiation source position located within said tubular member at a position axially corresponding to said first and second expandable devices;
• and
• an adjustable radiation source position mechanism for controllably adjusting the position of the radiation source position.