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Magnetic resonance imaging method and apparatus

A technology of magnetic resonance imaging and magnetic resonance images, which is applied in the field of medical image processing, can solve problems such as the complexity of the image processing process, and achieve the effect of simplifying the image processing process, making the image processing process simple and easy, and having good stability

Active Publication Date: 2016-08-17
SHANGHAI NEUSOFT MEDICAL TECH LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above technical problems, the embodiment of the present invention provides a magnetic resonance imaging method and device to solve the problem that the image processing process in the prior art is too complicated while ensuring the image clarity

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  • Magnetic resonance imaging method and apparatus
  • Magnetic resonance imaging method and apparatus
  • Magnetic resonance imaging method and apparatus

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Embodiment 1

[0073] see figure 1 , which is a flowchart of a magnetic resonance imaging method provided in Embodiment 1 of the present invention, the method includes the following steps:

[0074] Step 101: Perform complex high-pass filtering on the original image to obtain a filtered image.

[0075] Among them, in order to eliminate the low-frequency disturbance caused by the inhomogeneity of the background magnetic field and obtain a clearer image, it is necessary to perform high-pass filtering on the original image. Since the image data in the original image is complex, the high-pass filtering is high-pass filtering in complex form.

[0076] In a preferred embodiment of the present invention, homomorphic high-pass filtering can be used to implement complex high-pass filtering.

[0077] For example, the original image is ρ(r), and the image after homomorphic high-pass filtering of the original image is:

[0078] ρ HF (r)=exp(FFT -1 (Han(r)×FFT(ln(ρ(r)))))

[0079] Among them, ρ HF ...

Embodiment 2

[0106]Through the magnetic resonance imaging method in Embodiment 1, magnetic resonance images at various levels can be obtained. In order to further make the susceptibility signals of the venous blood vessels dispersed in each layer continuous, and finally show the continuous venous blood vessel structure, the second embodiment, on the basis of the first embodiment, performs the minimum signal on the obtained magnetic resonance images of each layer Intensity projection.

[0107] see Figure 5 , which is a flowchart of a magnetic resonance imaging method provided in Embodiment 2 of the present invention, the method includes the following steps:

[0108] Step 501: Perform complex high-pass filtering on the original image to obtain a filtered image.

[0109] Step 502: Obtain image data from the filtered image, segment the value of the imaginary part in the image data, and perform different normalizations on the value of the real part of the image data within the range of each ...

Embodiment 3

[0115] Corresponding to the foregoing magnetic resonance imaging method, an embodiment of the present invention further provides a magnetic resonance imaging apparatus. see Figure 6 , which is a structural block diagram of a magnetic resonance imaging apparatus provided in Embodiment 3 of the present invention, and the apparatus includes: a high-pass filtering unit 601 , a normalization processing unit 602 and a weighting calculation unit 603 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0116] A high-pass filtering unit 601, configured to perform complex high-pass filtering on the original image to obtain a filtered image.

[0117] A normalization processing unit 602, configured to obtain image data from the filtered image, segment the imaginary part values ​​in the image data, and segment the real part values ​​in the image data within each segment range Perfor...

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Abstract

The embodiment of the invention discloses a magnetic resonance imaging method. The method includes: performing complex high-pass filtering on the original image to obtain a filtered image; obtaining image data from the filtered image, segmenting the value of the imaginary part in the image data, and calculating the The real part values ​​in the image data are subjected to different normalization processes; the processed values ​​are used as weight values ​​and multiplied by the gray value of the amplitude image to finally obtain a magnetic resonance image. According to the embodiments of the present invention, a fast and convenient magnetic resonance imaging method can be provided while ensuring image clarity. The problem that the susceptibility weighted image processing process in the prior art is too complicated is solved. The embodiment of the present invention also provides a magnetic resonance imaging device.

Description

technical field [0001] The invention relates to the field of medical image processing, in particular to a magnetic resonance imaging method and device. Background technique [0002] Susceptibility Weighted Imaging (SWI) technology is a newly developed MRI contrast-enhanced imaging technology in recent years. Unlike previous proton density, T1 or T2 weighted imaging, SWI provides image contrast enhancement based on differences in susceptibility (sensitivity can be quantified as magnetic susceptibility) between different tissues. [0003] Studies have found that since the main component of venous blood is paramagnetic deoxyhemoglobin, and the main component of arterial blood is diamagnetic oxyhemoglobin, there is a difference in susceptibility between venous blood vessels and arterial blood vessels, which will cause Ultimately, the signal intensities of the two blood vessels are different, which makes it possible for the venous blood vessels to be clearly imaged independently...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055
Inventor 杨萍丁浩达胡红兵
Owner SHANGHAI NEUSOFT MEDICAL TECH LTD