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A setup deviation determination device

A technology for determining device and deviation, applied in the field of positioning deviation determination, can solve the problems of positioning scan image and reset scan image coordinate base deviation, wrong positioning deviation, etc., to eliminate displacement in height direction, improve irradiation accuracy, and shorten treatment. effect of duration

Active Publication Date: 2021-03-30
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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  • A setup deviation determination device
  • A setup deviation determination device
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Embodiment Construction

[0055]Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0056] In the related art, it is considered that the coordinate references 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 bed.

[0057] However, when acquiring the positioning scanning image, positioning is performed by aligning the position marks of the image scanner with the body surfa...

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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 radiation therapy, and in particular to a method and device for determining setup deviation. Background technique [0002] Radiation therapy equipment is a device that uses X-rays to inhibit cell growth, and usually includes: accelerators, image scanners and movable treatment beds. During treatment, the treatment bed carrying the subject is located at the treatment position matched with the accelerator. Theoretically, at the treatment position, the isocenter of the accelerator (the irradiation center of X-rays emitted by the accelerator) is aligned with the treatment planning center of the subject (the area to be treated determined by the pre-acquired positioning scan image). However, in order to avoid damage to normal tissue cells by X-rays, it is necessary to determine the setup deviation of the subject in the treatment position to determine whether the isocenter of the accelerato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/04
CPCA61N5/1049A61N5/1075
Inventor 韩东辉
Owner SHENYANG NEUSOFT ZHIRUI RADIOTHERAPY TECH CO LTD
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