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Twisting radial lines with application to robust magnetic resonance imaging of irregular flow

✍ Scribed by John I. Jackson; Dwight G. Nishimura; Albert Macovski

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
626 KB
Volume
25
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

A problem with magnetic resonance angiograms of vessels containing irregular flow isthat flow‐induced dephasing can result in voids in the image. These void regionsare susceptible to misinterpretation as regions of stenosis or other vessel pathology. Flow‐induced dephasing can be minimized by using radial lines to cover k space. However, radial lines provide a very nonuniform, and hence, inefficient, coverage of k space. By twisting the outer portions of the radial trajectories, undistorted images of very rapid and turbulent flow can be obtained with a reasonable number of RF excitations. o 1992 Academic Press, Inc.

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