MOTION-CORRECTION TECHNIQUES FOR STANDING EQUINE MRI

Acceleration and motion-correction techniques for high-resolution intravascular MRI.

PURPOSE High-resolution intravascular (IV) MRI is susceptible to degradation from physiological motion and requires high frame-rates for true endoscopy. Traditional cardiac-gating techniques compromise efficiency by reducing the effective scan rate. Here we test whether compressed sensing (CS) reconstruction and ungated motion-compensation using projection shifting, could provide faster motion-...

Fast 2D MRI acquisitions for motion correction in PET-MRI

European Institute for Molecular Imaging, University of Münster, Münster, Germany We performed continuous, fast acquisitions of 2D MR slices covering the thorax under free breathing. In present work, acquired 2D stacks are re-stored using a respiration signal. The usage of 2D slices is similar to the method described in [1]. The proposed method, however, does not include a navigator and acquisi...

MRI-based nonrigid motion correction in simultaneous PET/MRI.

UNLABELLED Respiratory and cardiac motion is the most serious limitation to whole-body PET, resulting in spatial resolution close to 1 cm. Furthermore, motion-induced inconsistencies in the attenuation measurements often lead to significant artifacts in the reconstructed images. Gating can remove motion artifacts at the cost of increased noise. This paper presents an approach to respiratory mot...

Motion Correction with Propeller MRI: Application to Head Motion

A Frequency-Space Approach for Motion Correction in functional MRI

The registration of the temporal images acquired during a functional MRI experiment is a necessary step to ensure accurate activation images. Large data sets and off-line image reconstruction suggest 1) the need for efficient algorithms, 2) the importance of minimizing registration errors, 3) an advantage to be gained by working in the native MR k-space domain. We present the extension of a non...