Under-sampled 3D MRI using a shells k-space sampling trajectory

Details Under-sampled 3D MRI using a shells k-space sampling trajectory Under-sampled 3D MRI using a shells k-space sampling trajectory

2007-07-17

2007-07-17

Shrivastav, Brij (Department: 2859)

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

C324S309000

Reexamination Certificate

active

11341242

ABSTRACT:
A 3D MRI image is acquired as a series of spherical shells of increasing radius. Each shell is sampled by one or more interleaved spiral sampling trajectories and to shorten the scan time one or more spiral sampling trajectories are skipped in the larger shells that sample the periphery of k-space. Motion correction of the acquired k-space data is accomplished by reconstructing tracking images from each of the shells and locating markers therein which indicate object movement from a reference position. The k-space data is corrected using this movement information.

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