Prospective motion correction in functional MRI

Head Motion and Correction Methods in Resting-state Functional MRI

Resting-state functional magnetic resonance imaging (RS-fMRI) is used to investigate brain functional connectivity at rest. However, noise from human physiological motion is an unresolved problem associated with this technique. Following the unexpected previous result that group differences in head motion between control and patient groups caused group differences in the resting-state network w...

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...

Prospective motion correction of 3D echo-planar imaging data for functional MRI using optical tracking

We evaluated the performance of an optical camera based prospective motion correction (PMC) system in improving the quality of 3D echo-planar imaging functional MRI data. An optical camera and external marker were used to dynamically track the head movement of subjects during fMRI scanning. PMC was performed by using the motion information to dynamically update the sequence's RF excitation and ...

Motion under Control with Prospective Acquisition Correction (PACE) MRI Hot Topics Motion under Control with Prospective Acquisition Correction (PACE)

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...