Method for correcting respiratory artefacts in parallel-accelerated first-pass myocardial perfusion imaging
نویسندگان
چکیده
Background Myocardial first-pass perfusion (MPI) requires singleshot imaging of multiple slices per cycle. Breath-holding supports advanced high-resolution MPI methods, but tolerance to respiratory motion is desirable. Respiratory misregistration can induce aliasing artefacts by inaccurate coil sensitivity calibration, particularly at higher acceleration factors and during stress hyperpnea. Coil calibration can be adapted for respiratory motion, but autocalibration ("integrated”) methods limit acceleration, and temporal coil-calibration methods may reduce SNR or cause temporal smoothing. We evaluated a motiontracking modification of “prescan” parallel imaging specifically for MPI.
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