Method of magnetic resonance parameter imaging and system of magnetic resonance parameter imaging
An imaging method and imaging system technology, applied in image data processing, 2D image generation, instruments, etc., can solve the problems of low reconstruction image quality and short scanning time, and achieve the effect of improving image quality and shortening scanning time
Inactive Publication Date: 2013-04-10
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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[0005] Based on this, it is necessary to provide a magnetic resonance parametric imaging method that can shorten the scanning time and improve the image quality in order to solve the problems of short scanning time and low quality of reconstructed images in compressed sensing fast imaging
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[0039] Such as figure 1 Shown, in one embodiment, a kind of magnetic resonance parametric imaging method, comprises the steps:
[0040] Step S10, performing sparse transformation on the scanned signal to obtain a corresponding transform domain signal.
[0041] In this embodiment, the signal reflected by the dynamic scanning object is received during the dynamic scanning of the image, and the sparse transformation is performed on it to obtain the signal corresponding to the transformation domain.
[0042] In one embodiment, the specific process of the above step S10 is: performing sparse transformation on the transverse magnetization signal obtained by scanning through principal component analysis to obtain a corresponding transform domain signal.
[0043] In this embodiment, the relationship between the transverse magnetization signal and time conforms to the curve of a single exponential function, and the signal obtained through a certain transformation will be sparse, which...
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The invention provides a method of magnetic resonance parameter imaging and a system of the magnetic resonance parameter imaging. The method comprises the steps of obtaining a corresponding transform domain signal by thinning and transformation of a signal which is obtained by scanning, carrying out imaging rebuilding and support detection by iterative alternation of the transform domain signal, and updating the support obtained by detection to the next imaging rebuilding which is carried out in an iterative mode, and generating a parameter imaging by matching the rebuilt image. The system comprises a transformation module, an iterative alternation module and a matching module, wherein the transformation module is used for obtaining the corresponding transform domain signal by the thinning and the transformation of the signal which is obtained by the scanning, the iterative alternation module is used for carrying out the imaging rebuilding and the support detection by the iterative alternation of the transform domain signal and updating the support obtained by the detection to the next imaging rebuilding which is carried out in the iterative mode, and the matching module is used for generating the parameter imaging by matching the rebuilt image. The method of the magnetic resonance parameter imaging and the system of the magnetic resonance parameter imaging is capable of shortening scanning time and improving image quality.
Description
technical field [0001] The present invention relates to magnetic resonance imaging technology, in particular to a magnetic resonance parameter imaging method and system. Background technique [0002] Magnetic resonance imaging is multi-parameter imaging. Its imaging parameters include proton density, longitudinal magnetic susceptibility (T1) and transverse magnetic susceptibility (T2). Various parameter images such as proton density, longitudinal magnetic susceptibility, and transverse magnetic susceptibility of the same layer are obtained separately, which is beneficial to distinguish normal tissue from diseased tissue through multiple parameter images. The various parameter images generated by parametric imaging provide clinical applications. diagnostic information. [0003] However, the scanning time required in the imaging process is too long, resulting in low estimation accuracy of the relaxation time of T1 and T2, which cannot accurately indicate the signals of differ...
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Inventor 梁栋江克吴垠刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI