K-space substitution: a novel dynamic imaging technique

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 x 128 raw data set prior to image reconstruction. In this way the dynamic info...

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Bibliographic Details
Published in:	Magnetic resonance in medicine Vol. 29; no. 6; p. 830
Main Authors:	Jones, R A, Haraldseth, O, Müller, T B, Rinck, P A, Oksendal, A N
Format:	Journal Article
Language:	English
Published:	United States 01-06-1993
Subjects:	Animals Brain - pathology Brain Ischemia - diagnosis Contrast Media Dysprosium Image Processing, Computer-Assisted Magnetic Resonance Imaging - methods Organometallic Compounds Pentetic Acid Rats
Online Access:	Get more information
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Summary:	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 x 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 x 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.
ISSN:	0740-3194
DOI:	10.1002/mrm.1910290618