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Method and device for magnetic resonance image acquisition and reconstruction

A magnetic resonance imaging and imaging technology, which is applied in the directions of using the nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and magnetic variable measurement, and can solve problems such as being no longer effective.

Active Publication Date: 2015-07-01
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method of using RF pulse phase cycling to move FID and DC artifacts to the edge of the image is no longer effective when using this K-space parallel accelerated data acquisition

Method used

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  • Method and device for magnetic resonance image acquisition and reconstruction
  • Method and device for magnetic resonance image acquisition and reconstruction
  • Method and device for magnetic resonance image acquisition and reconstruction

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Embodiment Construction

[0054] 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.

[0055] 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.

[0056] 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 ima...

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Abstract

The invention provides a method and a device for magnetic resonance image acquisition and reconstruction. According to the method and the device, a magnetic resonance imaging system is enabled to use a radio frequency pulse phase cycling method to completely eliminate FID and / or DC artifacts 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.

Description

technical field [0001] The invention relates to the field of magnetic resonance imaging, in particular to a magnetic resonance image acquisition and reconstruction method and device. Background technique [0002] At present, Magnetic Resonance Imaging (MRI), 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 line along the readout direction, centered in the phase-encoding direction....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/56
Inventor 张卫国
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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