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A method for removing artifact from magnetic resonance arterial spin-labeled cerebral perfusion imaging data

A technology of arterial spin labeling and imaging data, which is applied in image data processing, image analysis, image enhancement, etc., can solve the problem of incomplete removal of artifacts, achieve the effect of reducing errors and improving detection accuracy

Active Publication Date: 2018-10-30
HANGZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problem that the artifact image removal method of magnetic resonance arterial spin-labeled brain perfusion imaging data is not in place, and to provide a method for removing artifact map of magnetic resonance arterial spin-labeled brain perfusion imaging data , which can effectively remove artifacts in the acquired cerebral blood flow image sequence, reduce errors, and improve image quality

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  • A method for removing artifact from magnetic resonance arterial spin-labeled cerebral perfusion imaging data
  • A method for removing artifact from magnetic resonance arterial spin-labeled cerebral perfusion imaging data

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Embodiment 1

[0031] Example 1: The method for removing artifacts from magnetic resonance arterial spin-labeled brain perfusion imaging data in this embodiment, the magnetic resonance arterial spin-labeled brain perfusion imaging data includes the cerebral blood flow map CBF of the measured brain at n time points 1 ~CBF n ,include:

[0032] Collect the structural image of the tested brain, segment the structural image to generate gray matter probability map GM and white matter probability map WM, gray matter probability map GM and white matter probability map WM form a reference image pmCBF, and use the reference image pmCBF to remove the measured brain at n time Spot Cerebral Blood Flow Mapping CBF 1 ~CBF n The artifact graph in , the method for removing the artifact graph includes the following steps:

[0033] S1: Calculate the correlation coefficient CC between each current remaining cerebral blood flow map and the reference image pmCBF;

[0034] S2: Starting from the cerebral blood ...

Embodiment 2

[0045] Embodiment 2: The method for removing artifacts from magnetic resonance arterial spin-labeled brain perfusion imaging data in this embodiment, the magnetic resonance arterial spin-labeled brain perfusion imaging data include cerebral blood flow maps (CBF) of the measured brain at n time points 1 ~CBF n ,include:

[0046] Collect the structural image of the brain under test, structural image and cerebral blood flow map CBF 1 ~CBF n All are three-dimensional stereograms composed of M-layer single-layer scans, and the cerebral blood flow map CBF 1 ~CBF n The single-layer cerebral blood flow scans of the same layer of the same layer form a group, and each group of images is processed separately to remove the artifacts in each group of images;

[0047] The method for removing the artifact map in a certain group of images comprises the following steps:

[0048] N1: Segment the scan image of a single-layer structural image corresponding to the group of images in the struc...

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Abstract

The invention discloses a magnetic resonance artery spin labeling cerebral perfusion imaging data artifact graph removal method. The method comprises steps that a structure image of a detected brain is acquired, the structure image is segmented to generate a grey matter probability graph GM and a white matter probability graph WM, the grey matter probability graph GM and the white matter probability graph WM form a reference image pmCBF, and artifact graphs of rheoencephalograms CBF1-CBFn at n time points of the detected brain are removed by utilizing the reference image pmCBF. The method is advantaged in that the artifact graphs of the rheoencephalogram sequence can be effectively removed, error reduction is realized, and image quality is improved.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance arterial spin labeling perfusion imaging, in particular to a method for removing artifact images of magnetic resonance arterial spin labeling brain perfusion imaging data. Background technique [0002] Cerebral perfusion, also known as cerebral blood flow (CBF), is an important physiological indicator. Measurement of cerebral blood flow can provide quantitative basis for clinical diagnosis of organic or functional brain lesions. Because activation of brain function will lead to changes in local cerebral blood flow, measuring cerebral blood flow has become an important means of brain function research. Clinical measurement of cerebral blood flow basically requires the injection of exogenous tracers or contrast agents. However, these tracers or contrast agents have different degrees of side effects such as radioactivity or nephrotoxicity, so the application is often limited, and repeate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T5/50
CPCG06T5/50G06T7/0014G06T2207/10088G06T2207/30016G06T2207/30101
Inventor 王泽
Owner HANGZHOU NORMAL UNIVERSITY
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