Device for driving and positioning a source holder in an applicator used in radiotherapy
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United States of America Patent
Stats
-
Jul 25, 1989
Grant Date -
N/A
app pub date -
Jan 27, 1988
filing date -
Jan 28, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a device used for introducing one or more radioactive sources into an applicator (14) used in radiotherapy and positioning them there. The sources are mounted at one of a cable (40) of small diameter which is movable along a guide tube (38), one end of which communicates with the applicator. The cable (40) is driven by a motor-driven roller (48) which is capable of sliding on the cable (40). An encoder is equipped with a roller (52) which is in tangential contact, without sliding, with the cable (40). If the cable encounters an obstacle, the encoder roller (52) immediately ceases to rotate, and the encoder sends a signal to a programmable control unit (75). The invention relates to the transfer of radioactive sources in radiotherapy.
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