Dynamic collimator for radiation therapy
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United States of America Patent
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Aug 15, 1995
Issued Date -
N/A
app pub date -
Jun 9, 1993
filing date -
Mar 19, 1992
priority date (Note) -
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Abstract
A radiation therapy apparatus includes a collimator that changes the width of a fan beam of radiation as a treatment volume of the patient crosses the volume exposed by the beam so as to minimize the irradiation of healthy tissue at the front and back of the tumor. The width of the fan beam may also be controlled to treat multiple adjacent, similar slices of the patient at one time reducing the treatment duration.
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