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Errors in spin–lattice relaxation time measurements from restricted volumes

✍ Scribed by Terry Morrone

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
468 KB
Volume
5
Category
Article
ISSN
0740-3194

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✦ Synopsis

In vivo T1 measurements are usually made from images. In this paper we describe an alternative method in which data are collected from a strip instead of from an entire plane. We will compare the signal-to-noise ratios, the time to make a measurement, and the error in T1 as well as other aspects of the two methods. We have found that the strip method has less inherent signal-to-noise, but that this may be compensated for by taking measurements at more than the usual two repetition rates. The method employs a selective 180 degree pulse as well as a selective 90 degree pulse. It is shown that both pulses effectively isolate the region of interest.

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