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Prior-information-enhanced dynamic magnetic resonance imaging

A magnetic resonance imaging and magnetic resonance image technology, which is applied in the fields of measuring magnetic variables, medical science, measuring devices, etc., can solve the problems of limited acquisition and no description and estimation, and achieves reduced power saving, reduced data acquisition, and significant power saving. Effect

Inactive Publication Date: 2005-08-10
KONINKLIJKE PHILIPS ELECTRONICS NV
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Problems solved by technology

Second, this well-known method assumes that the spatial distribution of the likelihood of variation is known, but it does not describe a technique for estimating it
Therefore, this known method is limited to the application of obtaining this spatial distribution by other means

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  • Prior-information-enhanced dynamic magnetic resonance imaging
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  • Prior-information-enhanced dynamic magnetic resonance imaging

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Embodiment Construction

[0044] Fast dynamic imaging requires adequate sampling of the k-t space, the space spanned by the wave vector of the magnetic resonance signal, ie, k-space and time. Existing k-t space imaging methods use (or search for) a suitable sampling pattern that prevents aliasing of image signals in the reciprocal x-f space, that is, geometric (real) space and frequency. Therefore, the fundamental limitation is the maximum packing of the x-f space signal. In the present invention, a spatial extension of the BLAST method is proposed which allows partial resolution of aliasing in a weighted least squares manner. This mode extends eg from parallel imaging which helps to further resolve aliasing to the use of multiple coils.

[0045] introduce

[0046] In dynamic imaging, data is collected at discrete locations over time. Due to the properties of the Fourier transform, sampling in the k-t space (1) results in a convolution of the image signal with the point spread function in the equiva...

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Abstract

The invention relates to a remodeling continuous magnetic resonance image based on the identified changeable likelihood distribution and the optional static reference image from the dynamic series magnetic resonance signal relevant group, which is characterized in that: the magnetic resonance signals are collected in sub-sampling mode through receiver antenna with space sensitive distribution, and the magnetism resonance image can be selectively restructured based on the space sensitivity distribution.

Description

technical field [0001] The invention relates to a magnetic resonance imaging method for generating a sequence of magnetic resonance images. Background technique [0002] This magnetic resonance imaging method is disclosed in the paper "Unifying linear prior-information-driven methods for accelerated image acquisition" in MRM46 (2001) 652-660 by J. Tsao et al. acquisition" by J. Tsao et al. in MRM46(2001) 652-660). [0003] This known magnetic resonance imaging method involves acquisition and reconstruction strategies with faster image acquisition. This known magnetic resonance imaging method is known in the technical field of magnetic resonance imaging as the widely used linear acquisition acceleration technique (BLAST). In this known method, static reference images are reconstructed from a training set of magnetic resonance signals. [0004] - identifying the likelihood distribution of changes in successive magnetic resonance images from static reference images, [0005...

Claims

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Application Information

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IPC IPC(8): A61B5/055G01R33/561
CPCG01R33/56308G01R33/5611
Inventor J·陶K·P·普鲁斯曼恩P·博斯格
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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