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3D coronary artery imaging with phase reordering for improved scan efficiency.

Jhooti, P; Keegan, J; Gatehouse, PD; Collins, S; Rowe, A; Taylor, AM; Firmin, DN; (1999) 3D coronary artery imaging with phase reordering for improved scan efficiency. Magn Reson Med , 41 (3) pp. 555-562.

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Abstract

Three-dimensional (3D) coronary imaging has the potential to overcome problems resulting from vessel tortuosity and to reduce partial volume effects. With these techniques, however, acquisition times are long and respiratory motion artifacts problematical. This work describes the development of a method that applies phase encode reordering to 3D acquisitions, allowing larger navigator acceptance windows to be used, with a consequent reduction in acquisition time. This method is compared with navigator acceptance window methods (the acceptance-rejection algorithm and the diminishing variance algorithm) and the retrospective respiratory gating technique, both in vitro and in vivo. The use of phase reordering with a 10 mm acceptance window provided a significant increase in scan efficiency over a non-reordered 5 mm method (P<0.001) with no significant change in image quality, and a significant increase in image quality compared with a non-reordered image acquired in the same time (P<0.05). A significant improvement in both image quality and scan efficiency was demonstrated over the retrospective respiratory gating method (P<0.05).

Type: Article
Title: 3D coronary artery imaging with phase reordering for improved scan efficiency.
Location: United States
Keywords: Adult, Analysis of Variance, Artifacts, Blood Flow Velocity, Coronary Vessels, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Angiography, Male, Phantoms, Imaging, Sensitivity and Specificity
UCL classification: UCL > School of Life and Medical Sciences
UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science
URI: http://discovery.ucl.ac.uk/id/eprint/137844
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