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
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[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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