Magnetic resonance perfusion imaging postprocessing method and system thereof

Abstract

The invention provides a magnetic resonance perfusion imaging postprocessing method and a system thereof. The method comprises the following steps of perfusing image filtering to an original brain, removing a brain edge and acquiring a filtered brain perfusion image; receiving an area selection instruction of a user, acquiring a selected area of a middle artery area in the filtered brain perfusion image and outputting a weighted artery input curve assessing an artery input function; according to an improved Gamma function, fitting the weighted artery input curve and a concentration time curve respectively so as to obtain the optimized artery input curve and the concentration time curve; according to an improved singular matrix decomposition method based on a non-parametric model, solving a relative quantification parameter of perfusion. Through carrying out weighted optimization on AIF and a solving matrix, sensitivity to a noise is reduced; a simplified and effective Gamma function is used to carry out fitting, a non-linear problem is converted into linear solution, and a post-treatment speed is accelerated.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance perfusion imaging, in particular to a post-processing method and system for magnetic resonance perfusion imaging. Background technique [0002] With the development of science and technology, the application of magnetic resonance imaging system at home and abroad is becoming more and more popular. Magnetic Resonance Imaging (MRI for short) is to use the hydrogen atoms in the human body all over the body to be excited by radio frequency pulses in an external strong magnetic field to generate nuclear magnetic resonance phenomena. The emitted nuclear magnetic resonance signal is input into the computer, and after data processing and conversion, the shape of various tissues of the human body is finally formed into an image. Magnetic resonance imaging can examine and diagnose diseases such as tumorous lesions, vascular lesions, infectious lesions, trauma, congenital developmental de...

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Problems solved by technology

[0006] In view of the shortcomings of the prior art above, the purpose of the present invention is to provide a post-processing method and system for magnetic resonance perfusion imaging, aiming at solving the problem that the post-processing method of contrast agent perfusion imaging in the prior art mainly uses the arterial input function ( AIF) and the concentration-time signal convolution relationship to solve the semi-quantitative parameters, the solution results are affected by the selection of mathematical models, and the image quality requirements are high, and the semi-quantitative parameters cannot be obtained quickly and accurately.

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