发明公开
EP2686852A1 POSITION SENSORING METHOD AND SYSTEM FOR A MULTI-LEAF COLLIMATOR 审中-公开
对于更叶准直器位置测量的方法和系统

POSITION SENSORING METHOD AND SYSTEM FOR A MULTI-LEAF COLLIMATOR
摘要:
A multi-leaf collimator for radiation therapy in which the position of the leaves (10; 10 - 1...10 - 20) are determined by measuring a magnetic field allows determine the leaf position with enhanced precision, and is at the same time robust to perturbations or disturbances. The magnetic sensor (12, 14) may comprise a magnetic encoder (14) that varies in a predefined pattern along a lengthwise direction of the magnetic element (12), in particular according to step function.
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