Work

Recovery of phase inconsistencies in continuously moving table extended field of view magnetic resonance imaging acquisitions

Year: 2005

Type: article

Abstract: MR images formed using extended FOV continuously moving table data acquisition can have signal falloff and loss of lateral spatial resolution at localized, periodic positions along the direction of table motion. In this work we identify the origin of these artifacts and provide a means for correction. The artifacts are due to a mismatch of the phase of signals acquired from contiguous sampling fields of view and are most pronounced when the central k-space views are being sampled. Correction can be performed using the phase information from a periodically sampled central view to adjust the phase of all other views of that view cycle, making the net phase uniform across each axial plane. Results from experimental phantom and contrast-enhanced peripheral MRA studies show that the correction technique substantially eliminates the artifact for a variety of phase encode orders.

Source: Magnetic Resonance in Medicine

DOI: 10.1002/mrm.20573

Authors: David G. Kruger, Stephen J. Riederer, Phillip J. Rossman, Petrice M. Mostardi, Ananth J. Madhuranthakam, Houchun H. Hu

Institution: Mayo Clinic

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: bronze

Funders: National Institutes of Health, National Heart, Lung, and Blood Institute, National Institute of Biomedical Imaging and Bioengineering

Awards: G2850205339, Modified Elliptical Centric View Orders for Improved Real-Time MRA, G5024129586, G7921352438