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Two-dimensional geometric correction method for magnetic resonance image

A geometric correction and magnetic resonance technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of inability to effectively extract magnetic resonance image control points, inability to estimate the deformation field of magnetic resonance image control points, etc. Conditional restrictions, the effect of a good correction effect

Inactive Publication Date: 2020-07-24
北京易康医疗科技有限公司 +3
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The present invention aims at defects such as the inability to effectively extract magnetic resonance image control points and the inability to estimate the deformation field outside the coverage of the magnetic resonance image control points in the above-mentioned prior art, and proposes a geometric correction algorithm for magnetic resonance images, including:

Method used

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  • Two-dimensional geometric correction method for magnetic resonance image
  • Two-dimensional geometric correction method for magnetic resonance image
  • Two-dimensional geometric correction method for magnetic resonance image

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Embodiment

[0052] In this embodiment, the image of the magnetic resonance water model is placed as figure 2 In the upper left position of the positioning board shown, the outer contour of the water model fits with the cross mark line, the scanning sequence used is tr_mpr_tra_p2_iso, the voxel is 1.0mm*1.0mm*1.0mm, and the image size is: 256mm*256*mm , the image center deviates from the magnet center R101.7mm, P18.8mm, H101.0mm, the number of layers collected is 144, and the data set Data1 is obtained.

[0053] Put the magnetic resonance water model image in such as figure 2 In the upper right position of the positioning board shown, the outer contour of the magnetic resonance water model image fits with the cross mark line, the scanning sequence used is tr_mpr_tra_p2_iso, the voxel is 1.0mm*1.0mm*1.0mm, and the image size is: 256mm* 256*mm, the image center deviates from the magnet center by L120.7mm, P18.8mm, H109.0mm, the number of layers collected is 144, and the data set Data2 is ...

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Abstract

The invention discloses a two-dimensional geometric correction method for a magnetic resonance image. When geometric distortion occurs in the magnetic resonance water model image, an image is obtainedby using an improved automatic window adjustment algorithm, the image is presented by using a water model, the displayed definition and contrast are further enabled to obtain basic parameters of longitudinal and transverse stretching states by combining the automatic window adjustment algorithm, and auditing correction is performed by using the automatic window adjustment algorithm so that the shape deviation generated by the dead weight of organs can be improved. And moreover, the problems can be effectively solved, and the magnetic resonance images with clearness and rich layers can be quickly and conveniently obtained.

Description

technical field [0001] The invention relates to the field of magnetic resonance imaging, in particular to an algorithm for two-dimensional geometric correction of magnetic resonance images. Background technique [0002] The two-dimensional geometric correction algorithm of magnetic resonance images is a digital image processing algorithm that corrects the geometrically distorted images in magnetic resonance images. Geometric distortion widely exists in TV screen edge, camera lens edge part and magnetic resonance image, and the present invention refers to the geometric distortion of magnetic resonance image in particular. The geometric distortion of MRI images is mainly caused by the non-linearity of the gradient field generated on the hardware of the MRI instrument. The distortion is more serious in the area farther away from the center of the magnet. At the same time, there are great differences according to individual body shapes. The geometric correction algorithm of mag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10088G06T2207/20024G06T5/80
Inventor 袁双虎李玮李莉韩毅刘宁张云胡建建袁朔吕慧颖于金明
Owner 北京易康医疗科技有限公司
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