US2008161633A1PendingUtilityA1

Expandable Brachytherapy Device with Constant Radiation Source Spacing

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Assignee: NORTH AMERICAN SCIENTIFIC INCPriority: Dec 28, 2006Filed: Feb 26, 2008Published: Jul 3, 2008
Est. expiryDec 28, 2026(~0.5 yrs left)· nominal 20-yr term from priority
A61N 5/1015A61N 2005/1018
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Claims

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

exact text as granted — not AI-modified
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.

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