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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 no description and estimation, limited acquisition, etc., and achieves reduction of data collection, reduction of power saving, and significant power saving. Effect

Inactive Publication Date: 2011-01-12
KONINK 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

Method used

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

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Embodiment Construction

[0063] 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 modality extends eg from parallel imaging which helps to further resolve aliasing to the use of multiple coils.

[0064] introduce

[0065] In dynamic imaging, data is collected at discrete locations over time. Due to the properties of the Fourier transform, sampling in k-t space results in a convolution of the image signal with the point spread function in the equivalen...

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Abstract

Successive magnetic resonance images are reconstructed from the respective sets of magnetic resonance signals of the dynamic series on the basis of the identified distribution of likelihood of changes and optionally the static reference image. The magnetic resonance signals are acquired by way of a receiver antennae system having a spatial sensitivity profile and in an undersampled fashion and the successive magnetic resonance imagesare reconstructed optionally also on the basis of the spatial sensitivity profile.

Description

[0001] This case is a divisional application with the application number 03810844.5, the filing date is May 9, 2003, and the invention title is "Advance Information Enhanced Dynamic Magnetic Resonance Imaging". technical field [0002] The invention relates to a magnetic resonance imaging method for generating a sequence of magnetic resonance images. Background technique [0003] This magnetic resonance imaging method is disclosed in J. Tsao et al. in MRM46 (2001) 652-660 in the paper "Unifying linear prior-information (prior-information) driven method for accelerated image acquisition (Unifying linear prior-information) -driven methods for accelerated image acquisition" by J. Tsao et al. in MRM46(2001) 652-660). [0004] 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 lin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/561A61B5/055
CPCG01R33/56308G01R33/5611
Inventor J·陶K·P·普鲁斯曼恩P·博斯格
Owner KONINK PHILIPS ELECTRONICS NV
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