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Liver magnetic resonance R2* parameter graph drafting method

A magnetic resonance image and magnetic resonance technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as blurred edges of parameter maps and limitations of local lesion diagnosis

Active Publication Date: 2016-05-25
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The object of the present invention is to provide a liver magnetic resonance R2 * Parametric map drawing method to solve the R2 produced by the existing test method * The edge of the parameter map is blurred, which has great limitations in the diagnosis of local lesions

Method used

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  • Liver magnetic resonance R2* parameter graph drafting method
  • Liver magnetic resonance R2* parameter graph drafting method
  • Liver magnetic resonance R2* parameter graph drafting method

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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 shows a liver magnetic resonance R2 of the present invention * An embodiment of a parametric map drawing method: a liver magnetic resonance R2 * A method for drawing a parameter map, comprising the following steps:

[0029] Step 1, collecting liver magnetic resonance images, and drawing the region of interest in the liver;

[0030] Step 2, for each target voxel in the region of interest, the adaptive weight of its neighborhood voxels is obtained according to the vector similarity measurement model;

[0031] Step 3: Combining the attenuation signal and adaptive weight of its neig...

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Abstract

The invention provides a liver magnetic resonance R2* parameter graph drafting method. The method comprises steps that a liver magnetic resonance image is acquired, and a liver interest area is drafted; for each target voxel in the interest area, adaptive weight of neighborhood voxels can be acquired according to a vector similarity measurement model; in combination with attenuation signals and the adaptive weight of the neighborhood voxels, an R2* value of each target voxel is acquired according to a target optimization function model and a non-center chi square distribution noise first-order moment model, and the liver magnetic resonance R2* parameter graph is acquired. Through the method, the spatial resolution and the signal-to-noise ratio of the liver magnetic resonance R2* parameter graph can be effectively improved, and a more accurate liver iron-content distribution graph can be acquired.

Description

technical field [0001] The invention relates to a liver magnetic resonance R2 * Parametric graph drawing method. Background technique [0002] For blood transfusion-dependent patients, such as sickle cell anemia and thalassemia patients, long-term blood transfusion therapy will cause excessive iron deposition in the liver, heart and other endocrine organs, which can lead to liver cirrhosis and even organ failure. Since 70% to 90% of excess iron in the human body will be deposited in the liver, liver iron concentration is usually used as an important indicator of iron content in the body. [0003] Compared with direct liver iron measurement method of percutaneous liver biopsy, based on liver magnetic resonance R2 * The hepatic iron measurement method with parameters can effectively avoid complications such as hepatic hemorrhage. Using MRI R2 * Parameters of liver iron measurement method, based on liver magnetic resonance R2 * The liver iron content measurement method bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10088G06T2207/20182G06T2207/30056G06T5/70
Inventor 王常青刘晓云陈武凡
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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