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Image acquisition and reconstruction method and system for magnetic resonance real-time guided intervention

An image acquisition and magnetic resonance technology, which is applied in the direction of using nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, and magnetic variable measurement, can solve problems such as low efficiency and long time, and achieve a large amount of calculation and avoid artifacts , the effect of improving the reconstruction speed

Active Publication Date: 2021-12-31
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Other technologies close to this patent do not use fixed spokes, so the trajectory needs to be recalculated every time it is reconstructed, which is inefficient and takes a long time

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  • Image acquisition and reconstruction method and system for magnetic resonance real-time guided intervention
  • Image acquisition and reconstruction method and system for magnetic resonance real-time guided intervention
  • Image acquisition and reconstruction method and system for magnetic resonance real-time guided intervention

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[0047] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0048] In order to realize MRI-guided real-time interventional imaging, the method of radial spoke sampling based on the golden angle is used to continuously acquire k-space during the interventional process and reconstruct the interventional images in real time. In order to speed up the image reconstruction process, the k-space acquisition trajectory is determined in advance as the golden angle radial spoke sampling trajectory under the full sampling condition, and the number of spokes is N. For the re...

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Abstract

The invention provides an image acquisition and reconstruction method and system for magnetic resonance real-time guided intervention. The method comprises the steps that a k space of a pre-intervention reference image is acquired by adopting a golden angle radial spoke sampling mode; real-time continuous sampling is carried out for the intervention process, and continuous sampling is carried out in a golden angle radial spoke sampling mode; and reconstruction is carried out based on the collected M radial spokes for the time resolution required for intervening real-time imaging. According to the method, the problems of long data acquisition and reconstruction time in interventional real-time imaging under the guidance of magnetic resonance are solved by adopting a mode of continuous golden angle radial sampling and fixed sampling track. Continuous golden angle radial sampling is carried out in the intervention process, so that artifacts possibly generated in the intervention dynamic process can be well avoided. Through sampling, storage and extraction application of a fixed golden angle radial track of a reference image before intervention, the problem that the calculated amount of track Fourier transform is large each time in image reconstruction is well solved, and the reconstruction speed is improved.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance imaging, in particular to an image acquisition and reconstruction method and system for real-time magnetic resonance guided intervention. Background technique [0002] Interventional magnetic resonance imaging (interventional MRI) is a method for displaying magnetic resonance images of the interventional process through image acquisition and reconstruction during the interventional process. Interventional magnetic resonance imaging is of great significance to many aspects of clinical interventional therapy, such as interventional therapy of brain tissue, which can greatly improve the accuracy and therapeutic effect of interventional therapy. It is also of great significance to clinical scientific research. [0003] In the patent document with the publication number CN103185878A, a method for parallel acquisition of magnetic resonance images is disclosed, including: setting at l...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/56
CPCG01R33/56
Inventor 冯原何钊
Owner SHANGHAI JIAO TONG UNIV
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