MULTI-FRAME MAGNETIC RESONANCE (MR) TOMOGRAPHY SYSTEM AND METHOD OF OPERATION THEREOF Russian patent published in 2019 - IPC A61B8/13 G01R33/565 G01R33/563 G01R33/48 

FIELD: medicine.

SUBSTANCE: group of inventions relates to magnetic resonance imaging (MRI) systems for reducing motion artifacts in reconstructed magnetic resonance (MR) images, which are captured using multi-frame (ms) image capturing techniques, and more specifically to MRI system, which may include reduction of artifacts arising from inter-frame motion when capturing multi-frame MR-images, and to a method of operation thereof. Magnetic resonance (MR) system comprises a housing, a main magnet, gradient coils, a radio frequency (RF) unit, controller, memory device configured to store at least scanning sequences, scanning parameters and generated image information, and a display configured to display the formed image information. Controller is configured to control gradient coils and the RF unit to perform the multi-frame image capturing process to capture the MR information for the multi-frame image set, each of which contains corresponding data, wherein part of MR-information is obtained using magnetic field gradient, and other part of MR-information is obtained without use of magnetic field gradient; training a convolution kernel containing data on a portion of MR information obtained without using a magnetic field gradient or using a self-learning process, wherein convolution kernel contains convolution data; iterative convolution of MR information obtained using a magnetic field gradient for two of a plurality of image frames, trained by convolution kernel with formation of synthetic k-space data for each corresponding frame of two image frames from a plurality of image frames for error correction associated with movement, wherein synthetic k-space data are generated while providing data matching between two of the plurality of image frames during the iterative convolution; projecting synthetic k-space data for two image frames; averaging of projected synthetic k-space data with generation of patient image information. Method of image reconstruction is determined by operation of magnetic resonance imaging system. Computer-readable non-temporal carrier storing software is configured to control a magnetic resonance (MR) tomography system.

EFFECT: use of group of inventions makes it possible to reduce motion artifacts in reconstructed MR images.

17 cl, 16 dwg