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Method and device for optimizing resolution ratio of magnetic resonance fingerprint imaging dictionary

An optimization method, magnetic resonance technology, applied in the medical field, can solve the problem of low MRF dictionary resolution and achieve the effect of avoiding low dictionary resolution and optimizing imaging speed

Pending Publication Date: 2022-04-15
UNITED IMAGING RES INST OF INNOVATIVE MEDICAL EQUIP
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to provide a magnetic resonance fingerprint imaging dictionary resolution optimization method, device, electronic equipment and storage medium, to solve the problem caused by manual interval setting of tissue parameters of imaging objects in the prior art. Technical problem with poor resolution of MRF dictionaries

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  • Method and device for optimizing resolution ratio of magnetic resonance fingerprint imaging dictionary
  • Method and device for optimizing resolution ratio of magnetic resonance fingerprint imaging dictionary
  • Method and device for optimizing resolution ratio of magnetic resonance fingerprint imaging dictionary

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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] Magnetic resonance fingerprinting (MRF) is a novel approach to quantitative magnetic resonance imaging (MRI) that simultaneously acquires multiple tissue parameters in a single acquisition. Its ability to repeatedly and quantitatively measure tissue parameters can be used for more objective tissue diagnosis, comparison of scan data acquired at different locations and at different time points, longitudinal tracking of individual patients and development of imaging biomarkers. Magnetic resonance fingerprinting can be used to assess brain, prostate, liver, heart, musculoskeletal imaging and per...

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Abstract

The invention discloses a magnetic resonance fingerprint imaging dictionary resolution optimization method and device, and the method comprises the steps: building a constraint condition and an objective function of a genetic algorithm, the constraint condition being built according to the preset magnetic resonance fingerprint imaging precision, and the objective function being built according to the step length of each tissue parameter of magnetic resonance fingerprint imaging; according to the objective function of the genetic algorithm, establishing a fitness function of the genetic algorithm; and based on a constraint condition, performing optimization calculation on the fitness function by adopting a genetic algorithm, and obtaining the step length of each tissue parameter of the corresponding target function under the optimal fitness function. According to the invention, the technical problem of low resolution of the MRF dictionary caused by the fact that the tissue parameters of the imaging object are manually set at intervals in the prior art is solved.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method, device, electronic equipment and storage medium for optimizing the resolution of a magnetic resonance fingerprint imaging dictionary. Background technique [0002] In magnetic resonance fingerprint imaging, it is necessary to design and construct the size of the MRF (magnetic resonance fingerprint) dictionary, the tissue parameters T1 (longitudinal relaxation time), T2 (transverse relaxation time), ρ (proton spin density) of the imaging object , all possible values ​​and actual scan sequence parameters TR (repetition time), FA (flip angle) and system parameters ΔB 0 (The difference in magnetic field strength caused by the inhomogeneity of the main magnetic field), using the Bloch equation and calculation simulation to calculate the signal evolution curve under the combination of tissue parameters and sequence parameters, to form an MRF dictionary, in which the MRF dict...

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Application Information

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IPC IPC(8): G06T11/00G06N3/12
CPCG06T11/003G06N3/126G06T2210/41G01R33/50G01R33/561G06T7/0012G06T2207/10088
Inventor 张丽
Owner UNITED IMAGING RES INST OF INNOVATIVE MEDICAL EQUIP
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