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Collimation aperture variable collimation device and varying method thereof

A technology of collimation aperture and collimation, which is applied in the direction of using diaphragm/collimator, radiation therapy, treatment, etc., can solve the tracking error of source body and collimator body, misalignment of inner hole of pre-collimator, and focusing accuracy Drop and other problems, to achieve the effect of protection safety, ensure the collimation accuracy, and ensure the treatment effect

Inactive Publication Date: 2005-07-06
ZUNRUI IND SHENZHEN CITY
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  • Abstract
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Problems solved by technology

[0007] The primary purpose of the present invention is to provide a collimation device with a variable collimation aperture and a conversion method thereof, which can improve the focusing accuracy of the rays of the radioactive source, and overcome the problems caused by the source body and the collimator during the rotation of the existing collimation device. The tracking error of the straight body makes the inner holes of the pre-collimator and collimator misaligned, resulting in the problem of decreased focusing accuracy; and the collimation aperture can be easily changed

Method used

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  • Collimation aperture variable collimation device and varying method thereof
  • Collimation aperture variable collimation device and varying method thereof
  • Collimation aperture variable collimation device and varying method thereof

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Embodiment Construction

[0054] Referring to Fig. 1, a kind of collimating device of variable collimating aperture has been shown among the figure, and it comprises: a pre-collimation body 4 and a collimation body 7, and described pre-collimation body 4 is arranged on the outside of collimation body 7, The shapes of the pre-collimation body 4 and the collimation body 7 are both hollow spherical crowns, and they have a common axis of rotation; there are several groups on the collimation body 7 that have the same distribution law as the radiation source and make the rays focus on a common The final collimator 8 on the focal point, the central through hole of each group of final collimator 8 is the radiation channel with the same aperture, and there is a group of precollimator 5 with the same distribution law as the radiation source on the precollimator 4, using The pre-collimator on the pre-collimator 4 is aligned with the radiation channels of a group of final collimators 8 on the collimator 7; a connec...

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Abstract

The present invention discloses a collimate device with changing collimating aperture which comprises a collimate body, on which at least two group of final collimate unit, drive unit for driving collimate device and a control unit being mounted. A pre-collimate body is installed outside the collimate body, on which a set of pre-collimate device having the same distribution with radioactive source are provided. The collimate body and pre-collimate body can be jointed end to end along axial direction to an integral body. Said collimate body can be rotatably mounted on a horizontal movable bracket, which enables the collimate body joint and separate with pre-collimate body axially. Method for changing collimating aperture is also disclosed.

Description

technical field [0001] The invention relates to a collimation device with variable collimation aperture and a conversion method thereof, which are used in radiation devices for rotary radiation therapy and belong to the field of physical therapy devices. Background technique [0002] The existing γ-ray radiation devices are medical and physical therapy devices. The early devices are generally fixed radiation devices. The radiation source is fixed in the source body and irradiated to the lesion of the patient after being collimated by a collimator. However, since static rays need to pass through the healthy tissue of the human body and enter the lesion, long-term use will damage the healthy tissue of the human body. [0003] In view of this, CN1087551A discloses a stereotactic rotatable focusing radiation device. The stereotactic radiation therapy device adopts the working principle of rotating focus, which can make the source body rotate and focus on the common intersection ...

Claims

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Application Information

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IPC IPC(8): A61N5/00G21K1/02
Inventor 王晓娟何志
Owner ZUNRUI IND SHENZHEN CITY
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