Magnetic resonance T2 * weighted rapid imaging method and device

An imaging method and technology of an imaging device are applied in the directions of using a nuclear magnetic resonance imaging system for measurement, magnetic resonance measurement, measurement device, etc., and can solve problems such as reduction

Active Publication Date: 2017-04-26
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology

[0006] Embodiments of the present invention provide a magnetic resonance T2* weighted fast imaging method and device to solve the current lack of a method that can not only ensure the signal-to-noise rati

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  • Magnetic resonance T2 * weighted rapid imaging method and device
  • Magnetic resonance T2 * weighted rapid imaging method and device
  • Magnetic resonance T2 * weighted rapid imaging method and device

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Embodiment Construction

[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] Such as figure 1 As shown, the embodiment of the present invention provides a magnetic resonance T2* weighted fast imaging method, including:

[0064] Step 101. Obtain a single-band radio frequency pulse of an object to be processed, and generate a multi-band radio frequency pulse according to the single-band radio frequency pulse.

[0065] Step 102: Modulate the initial phases of the multi-band radio frequency pulses at different repetition times acco...

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Abstract

The invention provides a magnetic resonance T2 * weighted rapid imaging method and device which relate to the magnetic resonance imaging technology field wherein the method comprises: according to single-band radio frequency pulses, generating multi-band radio frequency pulses; according to the fast parallel imaging technique based on controllable mixing and superposing, modulating the initial phases of the multi-band radio frequency pulses in different repetition times to generate the modulated multi-band radio frequency pulses; through the layer separation scanning and echo migration technique, generating the T2 * weighted imaging sequence based on multi-layer co-excitation technique and the layer separation scanning and echo migration technique; obtaining the multi-layer mixed and superposed images of a to-be-processed object; and using the reconstruction algorithm to reconstruct and process the multi-layer mixed and superposed images to determine the single layer T2 * weighted images. The method and apparatus of the invention can further accelerate the layer separation scanning and echo migration technique through the multi-layer co-excitation technique to realize faster T2 * weighted imaging to ensure the signal-to-noise ratio and reduce the influence of the artifacts and distortions on the image quality. The use of small flip angled radio frequency pulses effectively reduces the specific absorption rate.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a magnetic resonance T2* weighted fast imaging method and device. Background technique [0002] Currently, magnetic resonance T2* weighted imaging is widely used in the field of magnetic resonance imaging, such as functional magnetic resonance imaging (fMRI for short) and susceptibility weighted imaging (SWI for short). Magnetic resonance T2* weighted images can only be acquired by gradient echo sequence (GRE for short), and require a long echo time (echotime, TE), which makes the traditional gradient echo sequence in T2* weighted Imaging requires a long scan time, which reduces the time resolution of T2* weighted imaging and limits its application in many fields. Currently, T2 based on simultaneous multiple-slices excitation (SMS), echo-shifting (ES) and echo-planar imaging (EPI) The *weighted imaging method greatly reduces the scan time of T2*-weighted imag...

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Application Information

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IPC IPC(8): G01R33/56
CPCG01R33/5602
Inventor 苏适谢国喜张丽娟史彩云张晓咏任亚楠姜春香张行隆晓菁刘新
Owner SHENZHEN INST OF ADVANCED TECH
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