Method and device for removing artifacts in magnetic resonance imaging

Abstract

The invention discloses a method for removing artifacts in magnetic resonance imaging, which comprises the steps: plural groups of three-dimensional data are generated through scanning and each group of three-dimensional data comprise plural groups of two-dimensional data; all two-dimensional data corresponding to the same overlapping layer surface are subjected to weighting addition and maximum intensity projection, the data of weighting addition and the data of maximum intensity projection are superposed so as to generate two-dimensional data corresponding to the overlapping layer surface; and the tree-dimensional data consisting of the two-dimensional data of non-overlapping layer surface and the data corresponding to the overlapping layer surface are subjected to maximum intensity projection so as to generate a final image. The invention also discloses a device for removing the artifacts in magnetic resonance imaging. As all the tow-dimensional data corresponding to the same overlapping layer surface are subjected to mixed weighting addition instead of simple adoption of MIP for processing the data of the overlapping layer surface, important information of medical diagnosis in the data on the layer surface of each radio-frequency pulse edge can be retained maximally, while background signals can be smoothed effectively.

Description

Technical field [0001] The present invention relates to magnetic resonance imaging (MRI, Magnetic Resonance Imaging) technology, in particular to a method and device for removing artifacts in MRI. Background technique [0002] MRI technology can be used to image the blood vessels of the human body, called magnetic resonance angiography (MRA, magnetic resonance angiography). MRA is a non-invasive vascular examination technology of magnetic resonance, which has a unique position in the diagnosis of vascular diseases. With the continuous development of technology and the continuous improvement and development of magnetic resonance imaging instruments, MRA is also moving towards a more refined and more realistic response. The direction of the vascular situation develops. [0003] The Time of Flight (TOF) method is currently the most commonly used imaging technique in MRA. The principle is: due to the difference in the position of the blood flow and the static tissue within a time ran...

AI Technical Summary

Problems solved by technology

For the three-dimensional magnetic resonance TOF technology, there are usually a plurality of radio frequency pulse groups at different positions to image the human body, and there is overlap between the pulses. When using the MIP method for image display, artifacts will appear at the overlaps. When the artifacts are serious, the Diagnosis makes a big difference

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