Radiation therapy device employing cam pin and cam groove guiding system for controlling movement of linear multi-leaf collimator leaves
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United States of America Patent
Stats
-
Apr 18, 2000
Grant Date -
N/A
app pub date -
Jul 15, 1998
filing date -
Jul 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A conformal radiation therapy device is disclosed. A multi-leaf collimator is mounted adjacent the head of a linear accelerator. A pair of spaced guides which define predetermined cam grooves are supported by the patient table. The multi-leaf collimator includes a plurality of longitudinally slidable leaves. Each of the leaves includes a cam pin mounted in a respective cam groove. As the head and multi-leaf collimator rotate relative to the patient, the predetermined cam grooves acting through the cam pins slide the individual leaves to adjust a radiation window for controlling radiation to the patient.
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- Non-US Classification not provided for expired patents
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