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Magnetic resonance image scanning automatic positioning method based on human anatomic structure symmetry

A technology of magnetic resonance imaging and human anatomy, applied in magnetic resonance measurement, material analysis through resonance, magnetic performance measurement, etc., can solve the problem of inability to guarantee the consistency of the reference positioning line, low positioning accuracy of manual operation, and reducing the work efficiency of doctors, etc. problems to ensure consistency, reduce scan time, and reduce human error

Active Publication Date: 2006-10-11
NEUSOFT MEDICAL SYST CO LTD
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AI Technical Summary

Problems solved by technology

[0005] 1. Due to inevitable human error, the consistency of the reference positioning line cannot be guaranteed;
[0006] 2. The positioning accuracy of manual operation is low;
[0007] 3. Increase the workload of doctors, waste scanning time, and reduce the work efficiency of doctors

Method used

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  • Magnetic resonance image scanning automatic positioning method based on human anatomic structure symmetry
  • Magnetic resonance image scanning automatic positioning method based on human anatomic structure symmetry
  • Magnetic resonance image scanning automatic positioning method based on human anatomic structure symmetry

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Embodiment Construction

[0023] like figure 1 Shown, the present invention specifically comprises the following steps:

[0024] S10: Segment the target area in the entire acquired MRI image, that is, use an image segmentation method, such as the bimodal method, the Otsu method, or an iterative method (the Otsu method is used in this embodiment), and calculate the segmentation of the target area and the background area in the image The threshold value, use this threshold value to segment the target area in the image;

[0025] S20: Calculate the main axis of the target area, take the main axis as the initial symmetry axis, and the symmetry axis equation can be expressed as: y=ax+b;

[0026] In this embodiment, the main axis is used as the initial value of the axis of symmetry, and the calculation of the main axis can be divided into two steps. The first step is to calculate the center of gravity (x, y) of the target area as a point on the main axis; the second step is to calculate the center of gravity...

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Abstract

The invention discloses a method of automatic location for magnetic resonance imaging scanning based on the symmetry of dissect structure of human body. It comprises following steps: (a) getting MRT location image; (b) calculating location information of different position on MRT location image by using the symmetry of dissect structure of human body; (c) outputting location information of MRT location image; and step (b) also comprises steps: (1) dividing target zone on whole image; (2) initiating symmetrical axis of target zone; (3) calculating the point set of said target zone symmetry with said symmetrical axis; (4) defining price function according to said point set, and getting optimum value of price function through optimization; (5) getting the symmetrical axis used as location information in relative with said optimum value. The invention realizes automatic location of MRT scanning, guarantees uniformity of fault scanning image and increases location accuracy and work efficiency.

Description

technical field [0001] The invention relates to a medical image processing positioning method, in particular to a magnetic resonance imaging scanning automatic positioning method based on the symmetry of human anatomical structure. Background technique [0002] In MRI (Magnetic Resonance Imaging, Magnetic Resonance Imaging) scanning, it is necessary to scan in advance to obtain a positioning image, and set a reference positioning line in the positioning image, thereby determining the position and direction of the MRI tomographic scan. [0003] In the prior art, the system generally automatically generates a reference positioning line centered on the geometric center of the positioning image and parallel to the x-axis or y-axis in the positioning image. The position and direction of the reference positioning line determine the MRI tomographic position and orientation. However, in practical applications, it is clinically required that the position and direction of the referen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/055A61B19/00G01R33/20A61B90/00
Inventor 狄强魏阳杰徐刚康雁
Owner NEUSOFT MEDICAL SYST CO LTD
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