Novel T-weighted contrast preparation scheme for segmented k-space myocardial imaging
✍ Scribed by T.W. Redpath; S.I.K. Semple; G.D. Waiter; L. Frisch; M.Y. Norton; D.M. Morris; M. Egred
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 229 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
A novel T‐weighted contrast‐preparation scheme is described for use with segmented k‐space cardiac sequences. This approach frees the imaging phase from the requirement of a long TE and, hence, a relatively long TR. A [90°~x~‐τ‐90°~ρ~] preparation scheme is used to acquire four image data sets with the phase ρ of the second pulse set to x, y, –x, and –y. The ρ = x raw data is subtracted from the ρ = –x data to form the “x” image, with a similar subtraction to generate the “y” image. These images are added in quadrature to obtain the T‐weighted image. The method results in reduced artifact compared to a simple two‐image scheme with ρ = x, and y. T was measured in the myocardial septum in six normal volunteers by comparing τ = 7 and 28 ms images, and it was found to be 44 ± 5 ms at 0.95 T. Magn Reson Med 49:776–780, 2003. © 2003 Wiley‐Liss, Inc.