A magnetic resonance imaging method and device

A kind of magnetic resonance imaging and magnetic resonance technology, which is applied in the direction of magnetic resonance measurement, measurement using nuclear magnetic resonance imaging system, and magnetic variable measurement, etc., which can solve the problems of prolonged scanning time, inability to calibrate, and time consumption.

Active Publication Date: 2021-04-30
GE MEDICAL SYST GLOBAL TECH CO LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, reference scans consume additional time and can even double the scan time for MRI
In addition, commonly used reference scans can only be calibrated for the first order, and cannot be calibrated for high-order phase inconsistencies.

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  • A magnetic resonance imaging method and device
  • A magnetic resonance imaging method and device
  • A magnetic resonance imaging method and device

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Embodiment Construction

[0016] Specific implementations of the present invention will be described below. It should be noted that in the process of specific descriptions of these implementations, for the sake of concise description, it is impossible for this specification to describe all the features of the actual implementations in detail. It should be understood that, in the actual implementation process of any embodiment, just like in the process of any engineering project or design project, in order to achieve the developer's specific goals and to meet system-related or business-related constraints, Often a variety of specific decisions are made, and this can vary from one implementation to another. Furthermore, it will be appreciated that, while such development efforts may have been complex and lengthy, for those of ordinary skill in the art to which the present disclosure pertains, the disclosures disclosed in this disclosure Some design, manufacturing or production changes based on the techni...

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Abstract

The invention relates to a magnetic resonance imaging method and device. The method includes: generating multiple K-space images based on the magnetic resonance induction signals received in parallel; reconstructing the first sub-image corresponding to the readout gradient pulse in the first direction and the first sub-image corresponding to the readout gradient pulse in the second direction according to the multiple K-space images. Reading out the second sub-image corresponding to the gradient pulse; calculating the phase difference between the first sub-image and the second sub-image; updating the sensitivity distribution map according to the phase difference; and according to the sensitivity distribution map before updating and the sensitivity distribution after updating Figure, MRI images obtained by performing sensitivity encoding reconstruction on multiple K-space images.

Description

technical field [0001] The invention relates to a method and device for medical imaging, in particular to a method and device for magnetic resonance echo planar imaging. Background technique [0002] Magnetic resonance imaging (MRI) is a commonly used technology for clinical medical image acquisition. [0003] Echo-Planar imaging (Echo-Planar imaging) technology alternately collects odd and even echoes of MR signals by continuously applying multiple forward and reverse switching pulses in the direction of the MR readout gradient. [0004] Parallel MRI technology (Parallel MRI) uses multiple radio frequency receiving coils to receive MR induction signals in parallel, and reconstructs the final MR image through a special reconstruction method. Existing reconstruction methods include Sensitivity Encoding (SENSE) method, SMASH method and so on. Among them, the SENSE method relies on the accurate estimation of the sensitivity distribution map (Sensitivity Map) of each receiving...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/055G01R33/56
Inventor 赖永传王家正吴冰
Owner GE MEDICAL SYST GLOBAL TECH CO LLC
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