FID and/or DC artifact correction method and device, MRI acquisition and reconstruction method

A correction method and a correction device technology, which are applied in the field of medical imaging, can solve problems such as no longer effective, and achieve the effect of ensuring artifacts and image quality

Active Publication Date: 2015-09-30
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, phase cycling with RF pulses to move FID and / or DC artifacts to the edge of the image is no longer effective when acquiring data with this k-space parallel acceleration

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  • FID and/or DC artifact correction method and device, MRI acquisition and reconstruction method
  • FID and/or DC artifact correction method and device, MRI acquisition and reconstruction method
  • FID and/or DC artifact correction method and device, MRI acquisition and reconstruction method

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Embodiment Construction

[0046] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar extensions without violating the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

[0047] Secondly, the present invention is described in detail by means of schematic diagrams. When describing the embodiments of the present invention in detail, for convenience of explanation, the schematic diagrams are only examples, which should not limit the protection scope of the present invention.

[0048] Such as figure 1 As shown, in the spin echo imaging sequence, the sample is first excited with a 90-degree RF pulse, and after TE / 2 time, the sample is excited again with a 180-degree refocusing pulse, and then the...

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Abstract

The invention discloses an FID and / or DC artifact correction method and an FID and / or DC artifact correction device. By adopting the method, a magnetic resonance imaging system can use a radio frequency pulse phase cycling method to move FID and / or DC artifacts to the edge of an image when adopting a parallel accelerated acquisition method to acquire K-space data, thus not only realizing acquisition acceleration, but also ensuring elimination of FID and / or DC artifacts and ensuring the quality of images. The invention further provides an MRI acquisition and reconstruction method based on the FID and / or DC artifact correction method.

Description

technical field [0001] The present invention relates to the field of medical imaging, in particular to a FID and / or DC artifact correction method and device, and an MRI acquisition and reconstruction method based on the artifact correction method. Background technique [0002] At present, Magnetic Resonance Imaging (MRI) technology, as a computer imaging technology that integrates research results in multiple fields such as physics, chemistry, biology, and medicine, has been widely used in medical imaging examinations. Magnetic resonance imaging based on different sequences generally produces some interference signals along with the imaging data signal, some of which appear as artifacts on the image, such as the imaging process based on spin echo sequence (SE) and fast spin echo sequence (FSE) In this case, since the refocusing pulse generally deviates from the ideal 180-degree flip angle, FID artifacts are accompanied by it. The FID artifact appears in the image as a white...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/58A61B5/055
Inventor 张卫国
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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