System for cardiac MR and MR cine imaging using parallel image processing

摘要

A system for cardiac MR imaging receives a heart rate signal representing heart electrical activity. The system, over multiple successive heart cycles, uses multiple MR imaging RF coils in gradient echo imaging a patient heart, synchronized with the heart rate signal and uses an inversion recovery pulse for inverting myocardium tissue MR signal for an individual heart cycle, to acquire, within multiple individual successive portions of an individual heart cycle, corresponding successive multiple patient heart images. An individual image of an individual heart cycle portion is derived from multiple heart image representative data sets comprising a reduced set of k-space data elements acquired using corresponding multiple coils of the RF imaging coils. An image generator generates an MR image of an individual heart cycle portion using the multiple heart image representative data sets comprising the reduced set of k-space data elements.

主权项

1. A method for cardiac imaging that nulls a normal myocardium signal without use of a scout, the method comprising:
for each of a plurality of cardiac cycles within a single breath hold:
applying a non-selective inversion pulse during the cardiac cycle;identifying a plurality of successive phases of the cardiac cycle that are immediately subsequent to the non-selective inversion pulse, wherein there is no intervening time between application of the non-selective inversion pulse and the start of the plurality of successive phases of the cardiac cycle; andperforming single shot imaging to sample MR data along radial trajectories in k-space continuously during each of the successive phases of the cardiac cycle using a plurality of MR imaging RF coils to simultaneously acquire a plurality of reduced sets of k-space data elements associated with each of the successive phases of the cardiac cycle; performing k-t SPARSE-SENSE reconstruction on the plurality of reduced sets of k-space data elements acquired during corresponding phases of different ones of the plurality of cardiac cycles to generate an image for each of the phases of the cardiac cycle; and selecting one image of the plurality of images generated for the plurality of phases of the cardiac cycle in which the normal myocardium signal is nulled, wherein the MR data comprises gradient echo imaging data; and wherein the corresponding phases of different ones of the plurality of cardiac cycles have a same delay time interval from the non-selective inversion recovery pulse.