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Magnetic resonance imaging method and device

A magnetic resonance imaging and magnetic resonance technology, which is applied in magnetic resonance measurement, measurement using nuclear magnetic resonance image system, measurement of magnetic variables, etc., can solve problems such as prolonged scanning time, time-consuming, and inability to calibrate

Active Publication Date: 2016-11-23
GE MEDICAL SYST GLOBAL TECH CO LLC
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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.

Method used

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  • Magnetic resonance imaging method and device
  • Magnetic resonance imaging method and device
  • 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 a magnetic resonance imaging device. The magnetic resonance imaging method comprises the following steps: generating a plurality of K space diagrams on the basis of magnetic resonance sensation signals which are arranged in a parallel manner; according to the plurality of K space diagrams, reconstructing a first sub-image corresponding to a reading gradient pulse in a first direction, and a second sub-image corresponding to a reading gradient pulse in a second direction; calculating the phase difference between the first sub-image and the second sub-image; updating a sensitivity distribution diagram according to the phase difference; according to a sensitivity distribution diagram before updating and a sensitivity distribution diagram after updating, performing sensitivity encoding reconstruction on the plurality of K space diagrams, thereby obtaining magnetic resonance 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...

Claims

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Application Information

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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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