𝔖 Bobbio Scriptorium
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Spiral scanning with anisotropic field of view

✍ Scribed by Kevin F. King

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
737 KB
Volume
39
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

Spiral scanning has been used to achieve much shorter scan times than conventional techniques for a wide range of applications. The major drawback with spiral scans is blurring from off‐resonant spins, which is proportional to the readout time. Blurring limits maximal spatial resolution and minimal scan time potentially achievable with spiral scanning. Anisotropic field of view is used in conventional scanning to improve image quality by matching /c‐space trajectory to object characteristics. Anisotropic field of view improves spatial resolution in spiral scanning without increasing scan time or blurring. The resolution improvement results from increased maximal k‐space radius allowed by the lower field of view. A field of view reduction by a factor of 2 in one direction provides up to 60% resolution improvement in that direction. Reduced SNR also results from non‐uniform /c‐space sampling.

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