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Focus recognition method for ischemic stroke magnetic resonance images

A technology for ischemic stroke and lesion identification, applied in the field of medical aid identification, can solve problems such as large space and time overhead, uneven noise and grayscale, holes and over-segmentation

Inactive Publication Date: 2019-09-27
重庆携心科技股份有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the technical method disclosed in Chinese patent CN109509186, the region growing process is adopted to enhance the image features of the lesion area, but the region growing method is an iterative method, and the space and time overhead are relatively large, and noise and uneven gray scale may cause Causes holes and over-segmentation, and is often not very good at handling shadow effects in images
The difference in image features based on brain symmetry is used to determine the lesion area. Due to the influence of differences in brain lateralization caused by differences in cognitive functions, the bilateral cerebral hemispheres themselves have structural and morphological differences, which will bring certain errors to the segmentation.
And the obtained results are only displayed on a single image, which provides limited help for doctors

Method used

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  • Focus recognition method for ischemic stroke magnetic resonance images
  • Focus recognition method for ischemic stroke magnetic resonance images
  • Focus recognition method for ischemic stroke magnetic resonance images

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Embodiment Construction

[0061] The following is further described in detail through specific implementation methods:

[0062] Such as figure 1 As shown, a lesion identification method for magnetic resonance imaging of ischemic stroke comprises the following steps:

[0063] Image input step, input DWI image and ASL image;

[0064] The DWI image processing step is to process the DWI image and separate the infarction area in the image;

[0065] The ASL image processing step is to process the ASL image and separate the hypoperfusion area in the image;

[0066] The infarction calculation step is to calculate the volume of the infarction area;

[0067] A hypoperfusion calculation step, calculating the volume of the hypoperfusion area;

[0068] DWI three-dimensional reconstruction step, performing three-dimensional reconstruction and display on the DWI image;

[0069] ASL three-dimensional reconstruction step, performing three-dimensional reconstruction and display on the ASL image;

[0070] In the st...

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Abstract

The invention relates to the technical field of medical auxiliary recognition and relates to a focus recognition method for ischemic stroke magnetic resonance images. The method comprises an image input step, a DWI image processing step, an ASL image processing step, an infusion calculation step, a low perfusion calculation step, a DWI three-dimensional reconstruction step, an ASL three-dimensional reconstruction step, and an ischemia semi-dark zone identification step and the like. In the DWI image processing step and the ASL image processing step, a morphological method is adopted to enhance the characteristics of the image. Focus segmentation and direct volume calculation are realized based on a segmentation method of an adaptive threshold value. Ischemia semi-dark band recognition is realized through an image registration algorithm, and then a Mismatch value is calculated. The cerebral arterial thrombosis lesion position can be accurately recognized, a specific lesion volume value is provided, three-dimensional visual data display is provided, an accurate reference basis is provided for diagnosis and treatment of doctors, and clinical decision making of the doctors is assisted.

Description

technical field [0001] The invention relates to the technical field of medical aided identification, in particular to a lesion identification method for magnetic resonance images of ischemic stroke. Background technique [0002] Stroke is a common cerebrovascular disease characterized by high morbidity, mortality and disability. Acute ischemic stroke (acute ischemic stroke, AIS) accounts for 60% to 80% of strokes, and it is a disorder of blood supply to brain tissue caused by various reasons. Brain parenchyma imaging is commonly used clinically for disease diagnosis, curative effect evaluation, and prognosis judgment. Among them, DWI technology has extremely high sensitivity for infarction, and ASL can observe the range of ischemic penumbra very well, so as to evaluate the treatment. If the ratio of the volume of the ischemic penumbra to the volume of the infarct (Mismatch) is greater than or equal to 1.8, more brain tissue can be saved, and thrombolysis and other operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/136G06T7/62G06T5/00G06T5/30G06K9/34
CPCG06T7/0012G06T7/62G06T5/30G06T7/11G06T7/136G06T2207/10088G06T2207/30016G06V10/267G06V2201/03G06T5/70
Inventor 严治
Owner 重庆携心科技股份有限公司
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