Motion correction with PROPELLER MRI: application to head motion and free-breathing cardiac imaging.

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Background and purpose: Patient motion during myocardial perfusion SPECT can produce artifacts in reconstructed images which might affect clinical diagnosis. This paper attempts to present a new approach for the detection and correction of cardiac motion utilizing the data obtained during the imaging process. Materials and methods: Our method quantifies motion through polynomial curves modelin...

Motion corrected compressed sensing for free-breathing dynamic cardiac MRI.

Compressed sensing (CS) has been demonstrated to accelerate MRI acquisitions by reconstructing sparse images of good quality from highly undersampled data. Motion during MR scans can cause inconsistencies in k-space data, resulting in strong motion artifacts in the reconstructed images. For CS to be useful in these applications, motion correction techniques need to be combined with the undersam...

PROPELLER MRI: clinical testing of a novel technique for quantification and compensation of head motion.

While head motion is considered a significant problem in magnetic resonance imaging (MRI), there is no data to quantify its extent, severity, or effect on image quality. PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction) MRI offers a novel means of quantifying and compensating for head motion. We performed axial T2-weighted PROPELLER (motion corrected: P-CR...

Motion Correction with Propeller MRI: Application to Head Motion

A patient-adapted navigator tracking approach for prospective 3D respiratory motion correction in free-breathing myocardial perfusion imaging

H. Pedersen, S. Ringgaard, W. Y. Kim The MR Research Centre, Skejby Hospital, Aarhus University Hospital, Aarhus N, Denmark INTRODUCTION Quantitative analysis of myocardial perfusion using free-breathing first-pass perfusion MRI is degraded by respiratory induced motion of the heart. Conventional strategies to correct this motion include the manual alignment of each image to fit a reference ima...