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Magnetic resonance imaging image reconstruction method and image reconstruction device

A magnetic resonance imaging and image reconstruction technology, applied in image enhancement, image data processing, instruments, etc., can solve problems affecting imaging quality, accumulation, and reducing the signal-to-noise ratio of magnetic resonance images

Active Publication Date: 2017-04-05
SIEMENS SHENZHEN MAGNETIC RESONANCE
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Problems solved by technology

In the prior art, when the slices of the sub-slabs corresponding to the same position of the imaging area are directly superimposed, the noise will be accumulated, thereby reducing the signal-to-noise ratio (SNR, Signal-to-Noise Ratio) of the magnetic resonance image , affecting image quality

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  • Magnetic resonance imaging image reconstruction method and image reconstruction device
  • Magnetic resonance imaging image reconstruction method and image reconstruction device
  • Magnetic resonance imaging image reconstruction method and image reconstruction device

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Embodiment Construction

[0099] In the embodiment of the present invention, in order to reduce the cumulative effect of noise and weaken the influence of pure noise in each slice, it is considered to reduce the noise pixel value in each slice before merging each slice. For this reason, in the embodiment of the present invention, a noise threshold value used to mark the noise level is first determined, and then the noise pixel value in each slice is detected by using the noise threshold value, and then the value of the noise pixel value is reduced, and finally the value of the noise pixel value is reduced. Slices of noisy pixel values ​​are merged.

[0100] In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0101] Figure 4 It is an exemplary flowchart of an image reconstruction method for magnetic resonance imaging in an embodiment of the present invention. Such as ...

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Abstract

The invention relates to magnetic resonance imaging technology, and discloses an image reconstruction method and an image reconstruction device of magnetic resonance imaging. The image reconstruction method of the magnetic resonance imaging comprises carrying out filtering on the slice layer of each sub-thick-layer of an image field by using an average filter to acquire masks corresponding to each slice layer, and comparing the pixel value of each mask with a preset noise threshold value. To the pixel values which are smaller than the noise threshold value, the pixel values of relevant positions of corresponding slice layers of the masks are lowered according to a preset standard, and the slice layers of the sub-thick-layers corresponding to an identical position of an imaging area are merged to acquire the magnetic resonance image of the imaging area. The image reconstruction method and the image reconstruction device of the magnetic resonance imaging weakens the influence of noise, improves the signal to the noise ratio of a magnetic resonance image, and therefore improves image quality.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to an image reconstruction method and an image reconstruction device for magnetic resonance imaging. Background technique [0002] Magnetic resonance imaging is a technique that uses the phenomenon of magnetic resonance to perform imaging. The principle of magnetic resonance phenomenon mainly includes: atomic nuclei containing a single number of protons, such as hydrogen nuclei widely present in the human body, the protons have spin motion, just like a small magnet, and the spin axes of these small magnets have no certain rules. External magnetic field, these small magnets will be rearranged according to the magnetic force lines of the external magnetic field, specifically in two directions parallel to or antiparallel to the magnetic force lines of the external magnetic field, and the above-mentioned direction parallel to the magnetic force lines of the external m...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 李国斌
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE
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