Magnetic resonance fingerprint imaging based quick dictionary search method

A search method and magnetic resonance technology, applied in magnetic resonance measurement, character and pattern recognition, instruments, etc., can solve the problems of large amount of calculation, long calculation time, low search efficiency, etc., and achieve the effect of saving time

Active Publication Date: 2017-09-22
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problems of the existing dictionary search method of magnetic resonance fingerprint imaging, such as huge calculation amount, long calculation time and

Method used

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  • Magnetic resonance fingerprint imaging based quick dictionary search method
  • Magnetic resonance fingerprint imaging based quick dictionary search method

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Embodiment 1

[0063] Embodiment 1: A kind of fast dictionary search method that is used for magnetic resonance fingerprint imaging of this embodiment, such as figure 1 shown, including the following steps:

[0064] S1: For any given MRF scanning sequence and its scanning parameters, run the MRF scanning sequence through the magnetic resonance scanning equipment and obtain the actually collected magnetic resonance fingerprint S at each pixel position after data reconstruction;

[0065] S2: Search for the corresponding physical characteristic parameters of each pixel. Searching for the corresponding physical characteristic parameters of a certain pixel includes the following steps: dynamically generate the signal dictionary D corresponding to the magnetic resonance fingerprint signal S of the pixel, and generate the magnetic resonance fingerprint signal S of the pixel Matching with the corresponding signal dictionary D to find the closest matching item to the magnetic resonance fingerprint S ...

Embodiment 2

[0085] Embodiment 2: A kind of fast dictionary search method that is used for magnetic resonance fingerprint imaging of this embodiment comprises the following steps:

[0086] S1: For any given MRF scanning sequence and its scanning parameters, run the MRF scanning sequence through the magnetic resonance scanning equipment and obtain the actually collected magnetic resonance fingerprint S at each pixel position after data reconstruction;

[0087] S2: Search for the corresponding physical characteristic parameters of each pixel (T 1 ,T 2 , ΔB), search for the corresponding physical characteristic parameters of a certain pixel (T 1 ,T 2 , ΔB) includes the following steps: dynamically generate the signal dictionary D(T 1 ,T 2 , ΔB), the magnetic resonance fingerprint signal S of the pixel and its corresponding signal dictionary D(T 1 ,T 2 , ΔB) for matching, and find the closest matching item to the magnetic resonance fingerprint S of the pixel, and the closest matching ite...

Embodiment 3

[0102] Embodiment 3: A kind of fast dictionary search method that is used for magnetic resonance fingerprint imaging of this embodiment, comprises the following steps:

[0103] S1: For any given MRF scanning sequence and its scanning parameters, run the MRF scanning sequence through the magnetic resonance scanning equipment and obtain the actually collected magnetic resonance fingerprint S at each pixel position after data reconstruction;

[0104] S2: Search for the corresponding physical characteristic parameters of each pixel (T 1 ,T 2 , ΔB), search for the corresponding physical characteristic parameters of a certain pixel (T 1 ,T 2 , ΔB) includes the following steps: dynamically generate the signal dictionary D(T 1 ,T 2 , ΔB), the magnetic resonance fingerprint signal S of the pixel and its corresponding signal dictionary D(T 1 ,T 2 , ΔB) for matching, and find the closest matching item to the magnetic resonance fingerprint S of the pixel, and the closest matching it...

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Abstract

The invention discloses a magnetic resonance fingerprint imaging based quick dictionary search method. The magnetic resonance fingerprint imaging based quick dictionary search method comprises the steps of S1, running an MRF scanning sequence for any given MRF scanning sequence and scanning parameters thereof by a magnetic resonance scanning device to obtain a magnetic resonance fingerprint S actually collected at each pixel position; S2, searching a physical characteristic parameter corresponding to each pixel, wherein the step of searching the physical characteristic parameter corresponding to one pixel comprises the sub-steps of matching the magnetic resonance fingerprint signal S of the pixel with the corresponding signal directory D and finding a matching item most proximal to the magnetic resonance fingerprint S of the pixel, and the most proximal matching item is the physical characteristic parameter of the pixel; and S3, integrating the physical characteristic parameters of all the pixels respectively to obtain a needed complete physical characteristic image. The magnetic resonance fingerprint imaging based quick dictionary search method can efficiently reduce the search calculation complexity, can reduce the calculation time and can improve the search efficiency.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance fingerprint imaging, in particular to a fast dictionary search method for magnetic resonance fingerprint imaging. Background technique [0002] Magnetic resonance fingerprinting (Magnetic Resonance Fingerprinting, MRF) is a new method of magnetic resonance imaging. Unlike the traditional method, which uses one magnetic resonance scan to acquire only one physical feature image, this method can simultaneously acquire multiple physical feature images after one scan, thereby improving the efficiency of magnetic resonance scanning. In the data acquisition sequence of the MRF method, the settings of sequence parameters such as the excitation angles (flip angles, FA), echo times (echo times, TE) and repetition times (repetition times, TR) are all randomly changed, which makes all The generated magnetic resonance signals are independent of the dependence on different sequence parameters, there...

Claims

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Application Information

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IPC IPC(8): G06K9/00G01R33/32
CPCG01R33/32G06V40/13G06F2218/12
Inventor 王泽谢军
Owner HANGZHOU NORMAL UNIVERSITY
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