Technology for reconstructing MRI fingerprint identification based on sliding window

A fingerprint identification and sliding window technology, applied in the field of information processing, can solve the problems of high undersampling, affect the accuracy of dictionary recognition, increase the acquisition time, etc., achieve the effect of small error, shorten the total acquisition time, and accurately quantify the imaging results of parameters

Active Publication Date: 2016-08-17
ZHEJIANG UNIV
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Problems solved by technology

[0004] However, because the traditional magnetic resonance fingerprinting technology only acquires one helix in each TR, the acquisition signal is highly under-sampled for each excitation, and the reconstructed image is full of irrelevant under-sampling artifacts.
This noise-like undersampling artifact will affect the accu...

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  • Technology for reconstructing MRI fingerprint identification based on sliding window
  • Technology for reconstructing MRI fingerprint identification based on sliding window
  • Technology for reconstructing MRI fingerprint identification based on sliding window

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Embodiment

[0026] A sliding window-based magnetic resonance fingerprint recognition and reconstruction technology, which reconstructs the image sequence along the sliding window along the time axis of the acquired signal and generates dictionary elements corresponding to the window width, such as figure 1 As shown, the technique specifically includes the following steps:

[0027] (1) Magnetic resonance signal acquisition: in the magnetic resonance imager, use the pulse sequence acquisition image based on the magnetic resonance fingerprint identification technology framework; The magnetic resonance signal acquisition among the present invention is in the MAGNETOM Prisma 3T magnetic resonance imager of German Siemens company Completed. Images were acquired using a pulse sequence based on a magnetic resonance fingerprinting architecture, in which a different TR (ranging from 10 ms to 12 ms in a Perlin noise pattern) and FA (ranging from 5 degrees to 80 degrees) was used in each excitation o...

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Abstract

The invention relates to the technical field of information processing, and in particular to a technology for reconstructing MRI fingerprint identification based on a sliding window. The technology reconstructs an image sequence based the sliding window in an acquisition signal time axis and generates a dictionary element corresponding with a window width. The technology can shorten total acquisition time, can obtain a more accurate quantitative parameter imaging result and smaller errors provide with same acquisition time. In addition, since the method is a non-iteration method, the method requires similar time for reconstruction as traditional MRI fingerprint identification technology, thus having greater application value.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a sliding window-based magnetic resonance fingerprint identification and reconstruction technology. Background technique [0002] Magnetic resonance imaging (MRI) is a multi-parameter imaging technique without ionizing radiation, which has a wide range of medical and clinical applications. As a research direction of magnetic resonance technology, magnetic resonance quantitative imaging mainly uses the change of received signal intensity after excitation by different radio frequency pulse sequences to calculate the T of different tissues in the body. 1 , T 2 Maps of quantitative parameters such as relaxation time and proton density. This quantitative map can intuitively reflect the different physiological and physical properties of tissues, so it has potential application value in medical diagnosis. Since conventional quantitative imaging techniques need to desig...

Claims

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Application Information

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IPC IPC(8): G06T11/00G06K9/00
CPCG06T11/003G06T2210/41G06T2211/416G06V40/13
Inventor 钟健晖何宏建曹笑之廖聪裕王郅幸陈颖叶慧慧丁秋萍
Owner ZHEJIANG UNIV
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