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Detection method and detection die body for treatment precision of MRI positioning gamma knife

A detection method, Gamma Knife technology, applied in treatment, radiation therapy, X-ray/γ-ray/particle irradiation therapy, etc., can solve the problem of inability to judge whether the MRI positioning image has distortion MRI scanning, etc., to improve accuracy and Repeatability, ensure treatment accuracy, complete and clear images

Active Publication Date: 2020-08-14
江苏准成测量工程研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems existing in the existing single-point detection technology that it is impossible to judge whether there is distortion in the MRI positioning image, and whether there is a difference between MRI scans of different sequences, and to provide a detection method for the accuracy of MRI positioning Gamma Knife treatment and detection phantom

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  • Detection method and detection die body for treatment precision of MRI positioning gamma knife
  • Detection method and detection die body for treatment precision of MRI positioning gamma knife
  • Detection method and detection die body for treatment precision of MRI positioning gamma knife

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Embodiment 1

[0043] See figure 1 , the present embodiment is a detection method and detection phantom of a kind of MRI positioning Gamma Knife treatment precision, and this detection method comprises steps:

[0044] S1. CT positioning accuracy calibration: use the spherical water model to perform CT positioning single-target treatment accuracy exposure detection and correction to determine the accuracy of CT positioning; the steps are as follows: a. Rigidly fix the spherical water model with built-in positioning parts on the Gamma Knife The base ring of the head frame is connected to the positioning bed; b. Use CT to scan the spherical water to obtain positioning images; c. Input the scanned data into the Gamma Knife treatment system to design a simulated treatment plan, d. Spherical water model The built-in positioning part is replaced with a film clip with a film, and the center point of the marked hole is punched out on the film, and the focal spot is obtained by simulated treatment; e....

Embodiment 2

[0054] See Figure 2-6 , the embodiment of the present invention also includes a spherical water mold for gamma knife positioning accuracy detection, with a spherical water mold 101, the spherical water mold 101 is rigidly fixed on the base ring of the gamma knife head frame, and the center A square through groove 111 is provided, and a drawer 102 is arranged in the square through groove 111, and a square groove 121 is opened in the middle of the drawer 102, and two film clips 103 or a positioning piece 104 are installed in the square groove 121; the center of the end face of the positioning piece 104 A φ3.5mm through marking hole 142 is provided, and four φ2mm marking holes 141 are provided at the central positions of the remaining four end faces of the positioning member 104. The marking holes 141 and 142 are filled with double developer and then sealed, and the axis of the φ2mm marking hole 141 is extended The intersection point of the line and the φ3.5mm marking hole 142 i...

Embodiment 3

[0062] See Figure 7-9 , the embodiment of the present invention also includes a matrix water model for gamma knife positioning accuracy detection, with a detection phantom 201, the detection phantom 201 is rigidly fixed on the base ring of the gamma knife head frame, and the detection phantom 201 is evenly distributed A number of horizontally placed hollow cylinders 202 are provided, and the hollow cylinders 202 are filled with dual display liquids; the hollow cylinders 202 are arranged in a symmetrical 8×8 matrix with the center point of the plane of the detection phantom 201 as the center, and the hollow cylinders on the four corners are removed There are 60 bodies 202 in total, and the central axis distance between two vertically and horizontally adjacent hollow cylinders 202 is 20.0mm; there is also a hollow cylinder 202 in the center of the 8×8 matrix, and the outer diameter of the hollow cylinders 202 is 13mm. The hollow holes in the middle are all 3.5 mm in diameter; t...

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Abstract

The invention relates to the technical field of measurement of medical equipment, in particular to a detection method and a detection die body for the treatment precision of an MRI positioning gamma knife. The method comprises the following steps: S1, calibrating CT positioning precision; S2, installing and fixing a die body; S3, acquiring a positioning image; S4, making a simulation treatment plan; S5, reading coordinates; S6, determining matrix water phantom standard coordinates; S7, comparing the coordinates; and S8, correcting a target point. Whether the coordinate difference between various points of a water phantom matrix is equal to the distance between entity points or not, whether the coordinates of CT / MRI positioning matrixes are the same or not, and whether MRI different sequence scanning and different time period scanning are consistent or not are observed, therefore, the geometric precision of a CT positioning image is verified, whether an MRI positioning image is distorted or not, whether different sequences have differences or not, and the degree of MRI stability are found, the precision of registration of the gamma knife and MRI positioning is also found, a basis isprovided for coordinate correction of a target point in an individual case during clinical treatment, and the gamma knife treatment precision of the MRI positioning is ensured.

Description

technical field [0001] The invention relates to the technical field of medical equipment measurement, in particular to an MRI positioning gamma knife treatment accuracy detection method and a detection phantom. Background technique [0002] CT (Computed Tomography), that is, electronic computer tomography, it uses a precisely collimated X-ray beam and a highly sensitive detector to scan a certain part of the human body one by one, with fast scanning time and clear images , high geometric accuracy and other characteristics, it can be used for the examination of various diseases and the display of anatomical structures. [0003] MRI is Magnetic Resonance Imaging, and its full English name is: Magnetic Resonance Imaging. Magnetic resonance imaging is a type of tomography, which uses magnetic resonance phenomena to obtain electromagnetic signals from the human body and reconstruct human body information. MRI images are very similar to CT images, both of which are "digital imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N5/10
CPCA61N5/1049A61N5/103A61N5/1075A61N2005/1061A61N2005/1092A61N2005/1055A61N2005/1076
Inventor 李胜元
Owner 江苏准成测量工程研究院有限公司
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