EXPANDABLE BRACHYTHERAPY DEVICE WITH CONSTANT RADIATION SOURCE SPACING

• US 20100191034A1
• Filed: 08/19/2009
• Published: 07/29/2010
• Est. Priority Date: 11/03/2006
• Status: Active Grant

• Current Assignee: Portola Medical, Inc. (Huiheng Medical, Inc.)
• Original Assignee: Portola Medical, Inc. (Huiheng Medical, Inc.)
• Inventors: Wong, Joe, Winch, Fredrick, Terwilliger, Richard A., Cutrer, L. Michael
• Granted Patent: US 8,157,717 B2
• Time in Patent Office: Days
• US Class Current: 600/3
• CPC Class Codes: A61N 2005/1018 with multiple channels for guiding radioactive sources
• CPC Class Codes: A61N 5/1015 Treatment of resected cavities created by surgery, e.g. lumpectomy

Abstract

A brachytherapy device may include an expandable outer cage, an expandable inner cage positioned within the outer cage and configured to receive radioactive material at its perimeter, and a movable actuator configured to cause the outer and inner cages to expand simultaneously in response to movement of the actuator between certain positions while maintaining a substantially constant separation distance between the outer and inner cages.

Claims

1. A brachytherapy device comprising:

an expandable outer cage;

an expandable inner cage positioned within the outer cage and configured to receive radioactive material at its perimeter; and

a movable actuator configured to cause the outer and inner cages to expand simultaneously in response to movement of the actuator between certain positions while maintaining a substantially constant separation distance between the outer and inner cages.