✦ LIBER ✦

Practical Implementation and Optimization of One-shot T1 imaging

✍ Scribed by I. Kay; R. M. Henkelman

Publisher: John Wiley and Sons
Year: 1991
Tongue: English
Weight: 696 KB
Volume: 22
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.1910220249

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✦ Synopsis

Abstract

Longitudinal relaxation times (T~1~) can be measured rapidly in an imaging context using a “one‐shot” method based on the pulse sequence originally proposed by D. C. Look and D. R. Locker (Rev. Sci. Instrum. 41, 250 1970). This sequence is significantly faster than either repeated inversion recovery or repeated saturation recovery methods. The method uses a 180° inversion pulse followed by multiple small‐angle α pulses that sample the longitudinal magnetization during its recovery. Choices of inversion pulse, tip angle, and time intervals are discussed for optimal clinical use. We can produce 29 images sampling the full T~1~ recovery curve with a 256 × 256 resolution in about 10 min. From this data, T~1~ images can be calculated with a precision of 10%. © 1991 Academic Press, Inc.

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