System for accelerated magnetic resonance imaging using parallel coils

摘要

An MR imaging system uses multiple RF coils for acquiring corresponding multiple image data sets of a slice or volume of patient anatomy. An image data processor comprises at least one processing device conditioned for, deriving a first set of weights for weighted combination of k-space data of the multiple image data sets for generating a calibration data set comprising a subset of k-space data of composite image data representing the multiple image data sets. The image data processor uses the calibration data set in generating a first MR image data set, deriving the parameters of a probability distribution in response to the first set of weights and the first MR image data set and deriving a second set of weights and second MR image data set together using the probability distribution.

主权项

1. A system for parallel image processing in MR imaging, comprising:
a plurality of MR imaging RF coils, wherein each MR imaging RF coil is configured to individually receive MR imaging signals representing a slice or volume of patient anatomy; an MR imaging arrangement configured to use the plurality of RF coils to acquire a corresponding plurality of incomplete image data sets of said slice or volume; and an image data processor comprising at least one processing device, wherein the image data processor is configured to:
derive a first set of weights for calculating a weighted combination of k-space data of said plurality of incomplete image data sets to generate a calibration data set comprising a subset of k-space data of composite image data representing said plurality of image data sets,generate a first complete MR image data set based on said calibration data set,determine parameters of a probability distribution based on said first set of weights and said first complete MR image data set,derive a second set of weights based on said calibration data set and on said first complete MR image data set, using said probability distribution, andgenerate a second complete MR image data set based on said second set of weights.