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Positioning deviation determining method and device

A technology for determining methods and devices, which is applied in radiation therapy, X-ray/γ-ray/particle irradiation therapy, treatment, etc., and can solve problems such as positioning scan image and reset scan image coordinate base deviation, positioning deviation, etc., Achieve the effects of eliminating displacement in the height direction, improving irradiation accuracy, and shortening treatment time

Active Publication Date: 2019-07-23
SHENYANG NEUSOFT ZHIRUI RADIOTHERAPY TECH CO LTD
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Problems solved by technology

However, the displacement in the height direction is not taken into consideration in the related art, resulting in a deviation in the coordinate basis of the positioning scan image and the reset scan image, resulting in an error in the acquired setup, and generating unexpected ionizing radiation during treatment

Method used

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  • Positioning deviation determining method and device
  • Positioning deviation determining method and device
  • Positioning deviation determining method and device

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Embodiment Construction

[0054] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0055] In the related art, it is considered that the coordinate reference of the positioning scan image and the reset scan image are the same, and both meet the position requirements of the image scanner and the treatment couch.

[0056] However, when acquiring the positioning scan image, the position mark of the image scanner is aligned with the mark on the surface of the subject...

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Abstract

The invention discloses a positioning deviation determining method and device and belongs to the technical field of image-guided radiotherapy. The method can avoid errors in a positioning deviation acquisition process and comprises the steps as follows: acquiring first space coordinates of a treatment table in a therapy position and the distance between the isocenter and the upper surface of the treatment table; controlling the treatment table to move to a scanning position according to preset second space coordinates, and acquiring a reset scanning image of an object, wherein the reset scanning image comprises an image of the upper surface of the treatment table; determining the position aligning to the isocenter with the image of the upper surface of the treatment table as a reference inthe reset scanning image according to the first space coordinates, the second space coordinates and the distance; and determining position deviation between a treatment plan center and the isocenteraccording to a positioning scanning image and the reset scanning image, and determining the positioning deviation according to the position deviation.

Description

Technical field [0001] The present disclosure relates to the technical field of image-guided radiotherapy, and in particular to a method and device for determining a positioning deviation. Background technique [0002] Radiotherapy equipment is a device that uses X-rays to inhibit cell growth. It usually includes an accelerator, an image scanner, and a movable treatment bed. During treatment, when the treatment bed carrying the subject is in the treatment position matched with the accelerator. Theoretically, the isocenter of the accelerator (the irradiation center of the X-ray emitted by the accelerator) is aligned with the treatment plan center of the subject (the area to be treated determined by the pre-obtained positioning scan image) during the treatment position. However, in order to avoid X-ray damage to normal tissue cells, it is necessary to determine the positioning deviation of the subject in the treatment position to determine whether the accelerator isocenter is alig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/1049A61N5/1075
Inventor 韩东辉
Owner SHENYANG NEUSOFT ZHIRUI RADIOTHERAPY TECH CO LTD
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