New Technique for Obtaining NMR Linewidth Images of Lung and Other Inhomogeneously Broadened Systems
✍ Scribed by K. Ganesan; D.C. Ailion; A.G. Cutillo; K.C. Goodrich
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 627 KB
- Volume
- 102
- Category
- Article
- ISSN
- 1064-1866
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✦ Synopsis
A new imaging technique is presented which displays the regional variation of the local NMR linewidth (rather than the spin density). The linewidth in a localized region is obtained from measuring the height of the spin echo as a function of asymmetry time (\left(\tau_{\mathrm{a}}\right)) in an asymmetric spin-echo imaging sequence. This technique has been used to obtain linewidth images from a phantom consisting of closely packed spherical glass beads ( (100 \mu \mathrm{m}) diameter) in water, normal excised unperfused rat lungs, and a thorax phantom consisting of sponges surrounding by water. The NMR linewidths determined using the new imaging technique are comparable to those obtained from nonimaging measurements. ci 1993 Academic Press, Inc.