POSITION SENSORING METHOD AND SYSTEM FOR A MULTI-LEAF COLLIMATOR
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United States of America Patent
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Issued Date -
Jan 9, 2014
app pub date -
Mar 9, 2012
filing date -
Mar 16, 2011
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Abandoned
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Abstract
A multi-leaf collimator for radiation therapy in which the position of the leaves are determined by measuring a magnetic field allows to determine the leaf position with enhanced precision, and is at the same time robust to perturbations or disturbances. The magnetic sensor may comprise a magnetic encoder that varies in a predefined pattern along a lengthwise direction of the magnetic element, in particular according to a step function.
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