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K-space substitution: A novel dynamic imaging technique

✍ Scribed by R. A. Jones; O. Haraldseth; T. B. Müller; P. A. Rinck; A. N. Øksendal

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
601 KB
Volume
29
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

A rapid dynamic imaging sequence has been developed in which only the 32 phase encoding steps that encode low spatial frequencies are collected for each dynamic image. These are substituted into a previously acquired, 128 × 128 raw data set prior to image reconstruction. In this way the dynamic information is retained while the overall appearance is improved in comparison with images obtained by zero filling to 128 × 128, leading to better qualitative evaluation. The limited k‐space sampling means that the technique is most effective for large homogeneous areas of signal change since fine changes in contrast are imperfectly recorded.

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