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Magnetic resonance dynamic imaging method, device and readable medium

A technology of dynamic imaging and magnetic resonance, which is applied in the direction of measuring devices, measuring magnetic variables, image data processing, etc., can solve the problem of losing good properties

Active Publication Date: 2019-08-16
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The uniform radial sampling mode of A-f BLAST limits the use of golden angle sampling, thus losing the good property of arbitrary time resolution reconstruction at any time point

Method used

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  • Magnetic resonance dynamic imaging method, device and readable medium
  • Magnetic resonance dynamic imaging method, device and readable medium
  • Magnetic resonance dynamic imaging method, device and readable medium

Examples

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Embodiment 1

[0073] Such as figure 1 and figure 2 As shown, the present embodiment provides an accelerated acquisition solution, which adopts a golden angle (golden angle) radial sampling trajectory and segmental (segment) sampling method to collect data.

[0074] Such as figure 1 As shown, a magnetic resonance dynamic imaging method provided in this embodiment includes the following steps:

[0075] Step 1: After receiving the trigger signal, the K-space is filled with segmented sampling between different respiratory cycles, and the K-space data is collected with the sampling method of the golden angle radial sampling trajectory within each cardiac cycle, where , the radial sampling trajectory of the golden angle is approximated by a uniform radial sampling trajectory whose projection quantity satisfies the Fibonacci number; Step 2: the a-f BLAST method is used to image the two dimensions of radial sampling projection and cardiac cycle Reconstruction, accelerated imaging using temporal...

Embodiment 2

[0106] This embodiment provides a magnetic resonance dynamic imaging device, including:

[0107] The data acquisition module is used to fill the K-space with the sampling method of segmented acquisition between different respiratory cycles, and collect the K-space data with the sampling method of the golden angle radial sampling trajectory within each cardiac cycle; a-f BLAST image reconstruction Module for image reconstruction using the a-f BLAST method in radially sampled projection and cardiac cycle dimensions.

[0108] Specifically, the a-f BLAST image reconstruction module includes:

[0109] Build a data module for data trimmed to Among them, the data for n R ×n FB ×n PS ×4.

[0110] rearrangement module for data The projections of the second dimension are rearranged into uniform radially sampled trajectories (n FB equally divided), where the n FB Is the Fibonacci number, get the data the data still n R ×n FB ×n PS ×4.

[0111] The first Fourier tran...

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Abstract

The invention relates to the technical field of magnetic resonance imaging, and discloses a magnetic resonance dynamic imaging method, a device and a readable medium. The magnetic resonance dynamic imaging method comprises the following steps: step 1: filling the K space with a sampling mode of subsection acquisition between different respiratory cycles after receiving a trigger signal, and sampling data in the K space with a sampling mode of golden angle radial sampling trajectory in each cardiac cycle, wherein the golden angle radial sampling trajectory is approximated by an uniform radial sampling trajectory with the number of projections meeting a Fibonacci number; step 2: reconstructing an image on the two dimensions including the projection of radial sampling and the cardiac cycle with a-f BLAST method. The method of the present invention adopts the special uniform radial sampling trajectory (with the number of projections being a Fibonacci number) to approximate the golden angleradial sampling trajectory, breaking the limit of the uniform radial sampling of circular offset as the sampling mode, and can be applied in the golden angle radial sampling trajectory commonly usedin the dynamic imaging.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a magnetic resonance dynamic imaging method, device and readable medium. Background technique [0002] Magnetic resonance imaging uses the principle of nuclear magnetic resonance to image human tissue through static magnetic field, radio frequency field and gradient coil. It has rich tissue contrast and high soft tissue resolution, and is harmless to the human body, so it has become a powerful tool for medical clinical diagnosis. However, magnetic resonance imaging usually requires a long scan time, especially in dynamic fields such as cardiac real-time imaging, which cannot meet the requirements of clinical applications. The slow imaging speed is a major bottleneck restricting its rapid development and wide application, so how to improve the imaging speed has always been a hot spot in the magnetic resonance academic and industrial circles. [0003] The curre...

Claims

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Application Information

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IPC IPC(8): G01R33/561A61B5/055G06T11/00
CPCA61B5/055G01R33/561G06T11/003
Inventor 梁栋丘志浪朱燕杰刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH
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