| 摘要 |
A method and system ( 2100 ) are provided for dispensing radiation to a patient from a location internal to the patient. The system ( 2100 ) includes a radioactive assembly ( 2106 ) having a radioactive material ( 2107 ); a first radiation resistant assembly ( 2102 ) having at least one first radiation resistant panel ( 2116 ), wherein at least one gap ( 2122 ) is formed in the first radiation resistant assembly ( 2102 ) for allowing radiation to pass there through to the ambient environment of the capsule; an actuator; and a second radiation resistant assembly ( 2104 ) having at least one movable second radiation resistant panel ( 2136 ) operationally coupled to the actuator for controllably moving the second radiation resistant assembly ( 2104 ) for positioning a respective second panel to a position with respect to a respective gap for selectively covering at least a portion of the respective gap for impeding passage of radiation through the respective gap to the ambient environment of the capsule; and control circuitry ( 906 ) for controlling activation of the actuator.
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