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Contour collimator for radiotherapy

A radiotherapy, collimator technology, applied in radiotherapy, using diaphragm/collimator, treatment, etc., can solve the problems of low dynamic characteristics and movement speed, deviation from target position, inaccurate adjustment, etc., to simplify the mechanical Assembly, simplified control loop algorithm, effect of dead time reduction

Active Publication Date: 2016-01-06
DEUTES KREBSFORSCHUNGSZENT STIFTUNG DES OFFENTLICHEN RECHTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the dynamic characteristics and the movement speed are very low
Furthermore, an additional position sensor is required to detect the exact position of the spacer element, since mechanical friction may cause deviation from the target position
The friction force partially applied to the diaphragm element by the transducer may also cause a lateral displacement of the diaphragm element in a direction oriented perpendicularly to the adjustment direction
Furthermore, linear guidance of the bulkhead elements must be provided, causing greater friction and thus inaccuracies in adjustment

Method used

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  • Contour collimator for radiotherapy
  • Contour collimator for radiotherapy
  • Contour collimator for radiotherapy

Examples

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Embodiment Construction

[0067] figure 1 is a perspective view of a profile collimator 10 according to the invention, the core of which is constituted by a guide module 12 . The guide module 12 includes a lower guide plate 14 , an upper guide plate 16 and two side walls 18 and 20 . Side walls 18, 20 connect the lower guide plate 14 and the upper guide plate 16 to each other. Thus, the guide module 12 generally comprises the shape of a rectangular frame. It goes without saying that the collimator 10 may comprise more guide modules 12 or the guide modules 12 may be divided into a plurality of rectangular frame elements. The guide module 12 may be covered at upper and lower sides by cover plates respectively including openings, which may be rectangular and provided at the center of the cover plates. The top surface of the lower guide plate 16 is provided with a plurality of lower guide grooves extending longitudinally of the guide module 12 and formed parallel to each other at equal transverse distanc...

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Abstract

The invention relates to a contour collimator (10) for radiotherapy, comprising a plurality of plate-shaped diaphragm elements (24) provided in a guiding block (12) and movably arranged with respect to one another to form a contour diaphragm for a radiation beam emitted by a radiation source towards the collimator (10), and at least one drive (30) for moving the diaphragm elements (24), wherein a drive (30) of its own is associated with each diaphragm element (24), the drives (30) of a group (26, 28) of diaphragm elements (24) are arranged substantially adjacent to one another, and the drive (30) is a linear motor (30), wherein each linear motor (30) comprises a linearly movable rod (40) directly fixed to the associated diaphragm element (24). The invention facilitates a design of a contour collimator (10) with a shape being as compact as possible, and wherein both precise and stable adjustability of the diaphragm elements (24) is achieved without a backlash. In this way improvements to contour collimators (10) are provided.

Description

technical field [0001] The invention relates to a profile collimator for radiotherapy comprising a plurality of spacer elements arranged in a guide module and arranged movably with respect to each other to form a The radiation source is directed towards the contour partition of the radiation beam emitted by the collimator and comprises at least one drive for moving the partition elements, wherein the drive itself is associated with each partition element, the drives of a group of partition elements being substantially connected to each other Arranged adjacently, and the drive transmission itself is disposed between each drive and the associated bulkhead element. Background technique [0002] Typically, the diaphragm elements are shaped or shaped as blades. Various embodiments of multi-leaf collimators comprising diaphragm element blade modules each having a blade unit and a blade drive unit are known in the art. This type of multi-leaf collimator is preferably used to cont...

Claims

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Application Information

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IPC IPC(8): G21K1/04
CPCG21K1/046A61N5/1045
Inventor K·施维欧拉S·席伯
Owner DEUTES KREBSFORSCHUNGSZENT STIFTUNG DES OFFENTLICHEN RECHTS
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