| 摘要 |
A brachytherapy device including an elongate member comprising a proximal portion and a distal portion. The device also includes a movable surface portion surrounding at least the distal portion of the elongate member and a plurality of source lumen tubes defining respective source lumens, the source lumen tubes being located around the elongate member, distal ends of the source lumen tubes coupled to the distal portion of the elongate member, the source lumen tubes extending a sufficient distance in a proximal direction such that the source lumen tubes extend outside a body when distal portions of the source lumen tubes are positioned in a body cavity for brachytherapy. The device also has structure coupled to the distal ends of the source lumen tubes for positioning the distal portions of the source lumen tubes at different distances from the elongate member for brachytherapy by exerting a force in a proximal direction on the distal ends of the source lumen tubes, the structure including an actuator for actuating the structure, at least a portion of the actuator being located outside the body when the distal portions of the source lumen tubes are positioned in a body cavity for brachytherapy. The device also includes a ring, tube or manifold securing a portion of the source lumen tubes proximal to the distal portion around the elongate member and a source of radiation suitable for insertion into the source lumens.
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