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A detection method of mri positioning gamma knife treatment accuracy

A detection method and Gamma Knife technology, applied in the fields of therapy, 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 in MRI scanning, etc., to ensure consistency, Ensure treatment accuracy and complete and clear images

Active Publication Date: 2022-05-06
江苏准成测量工程研究院有限公司
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  • 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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  • A detection method of mri positioning gamma knife treatment accuracy
  • A detection method of mri positioning gamma knife treatment accuracy
  • A detection method of mri positioning gamma knife treatment accuracy

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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: Step a. Rigidly fix the spherical water model with built-in positioning parts on the gamma The base ring of the knife head holder is connected to the positioning bed; step b. use CT to scan the spherical water to obtain a positioning image; step c. input the scanned data into the Gamma Knife treatment system, and design a simulated treatment plan; step d. Replace the built-in positioning part of the spherical water model with a film clip with a film, and mark the center point of the marked hole on the film to simulate the treatment to obtain the f...

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 20.0 mm; 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 13 mm. , the hollow holes in the middle are all 3.5 mm in diameter...

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Abstract

The invention relates to the technical field of medical equipment measurement, in particular to a detection method for MRI positioning gamma knife treatment accuracy and a detection phantom. S1. CT positioning accuracy calibration; S2. Installing a fixed phantom; S3. Collecting positioning images; S4. Making a simulation treatment plan; S5. Reading coordinates; S6. Determining the standard coordinates of the matrix water model; S7. Coordinate comparison; S8. Target correction. The invention verifies the geometry of the CT positioning image by observing whether the coordinate difference of each point of the matrix water model matrix is ​​equal to the physical point distance, whether the coordinates of the two positioning matrices of CT / MRI are the same, and whether the MRI scans of different sequences and scans of different time periods are consistent. Accuracy, whether there is distortion in the MRI positioning image, whether there is a difference between different sequences, how stable the MRI is, and the registration accuracy of Gamma Knife and MRI positioning provide the basis for the correction of the coordinates of individual cases during clinical treatment to ensure MRI positioning Gamma Knife treatment precision.

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 Patents(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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