## Abstract ^31^P MRS examinations of the calf muscles of 12 healthy volunteers were performed to determine __T__~2~ of the coupled ATP signals by using the 90°–TE/2–2662‐TE/2‐acq selective spin‐echo sequence for elimination of phase and intensity distortions. The __T__~2~ relaxation times obtained
31P transverse relaxation times of ATP in human brain in vivo
✍ Scribed by Wulf-Ingo Jung; Stefan Widmaier; Michael Bunse; Uwe Seeger; Klaus Straubinger; Fritz Schick; Klaus Küper; Günther Dietze; Professor Dr. Otto Lutz
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 296 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0740-3194
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
^31^P MRS examinations of the brain of 10 healthy volunteers were performed to determine T~2~ of the coupled ATP signals by use of the localized 90° ‐ TE/2 ‐ 2662 ‐ TE/2 ‐ acq frequency selective spin echo sequence for elimination of phase and intensity distortions. The T~2~ relaxation times obtained are much longer than usually assumed: γ‐ATP: 89 ± 9 ms; α‐ATP: 84 ± 6 ms; β‐ATP: 62 ± 3 ms.
📜 SIMILAR VOLUMES
## Abstract Localized ^31^P‐STEAM experiments were performed at 3 T to estimate relaxation times of phosphorus‐containing metabolites in the human calf muscle in vivo. __T__~1~ and __T__~2~ times of PCr, P~i~, and NTPs were measured in the resting calf muscle of healthy subjects by varying TR and T
## Abstract T~2~ measurements of ^31^P NMR signals of ATP using the Hahn 90°–180° spin‐echo sequence imply difficulties whenever the 180° pulse angle is not completely perfect. The reason for this finding is the crucial influence of the __J__ ‐couplings of the ATP signals which result in intensity
IP NMR spin-lattice (TI) and spin-spin (T2) relaxation times of phosphocreatine, ATP, inorganic phosphate, and phosphomonoesters have been measured in vivo at 4.1 T in rat brain and rat brain tumors implanted on nude mice. The relaxation data were acquired using a phase-cycled saturation-recovery sp