Processing of radial fast spin-echo data for obtaining T2 estimates from a single k-space data set
✍ Scribed by Maria I. Altbach; Ali Bilgin; Zhiqiang Li; Eric W. Clarkson; Theodore P. Trouard; Arthur F. Gmitro
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 887 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
Radially acquired fast spin‐echo data can be processed to obtain T~2~‐weighted images and a T~2~ map from a single k‐space data set. The general approach is to use data at a specific TE (or narrow TE range) in the center of k‐space and data at other TE values in the outer part of k‐space. With this method high‐resolution T~2~‐weighted images and T~2~ maps are obtained in a time efficient manner. The mixing of TE data, however, introduces errors in the T~2~‐weighted images and T~2~ maps that affect the accuracy of the T~2~ estimates. In this work, various k‐space data processing methods for reconstructing T~2~‐weighted images and T~2~ maps from a single radial fast spin‐echo k‐space data set are analyzed in terms of the accuracy of T~2~ estimates. The analysis is focused on the effect of image artifacts, object dependency, and noise on the T~2~ estimates. Results are presented in computer‐generated phantoms and in vivo. Magn Reson Med, 2005. © 2005 Wiley‐Liss, Inc.