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Spin-echo methods for the determination of 31P transverse relaxation times of the ATP NMR signals in vivo.
31P magnetic resonance spectroscopy (MRS) examinations of the calf muscles of healthy volunteers were performed to determine T2 of the coupled ATP signals by use of the Hahn spin-echo and theExpand
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Phosphorus J coupling constants of ATP in human myocardium and calf muscle.
Proton-decoupled 31P NMR spectroscopy of the heart and calf muscle of healthy volunteers was performed with a 1.5 T whole-body imager. By use of two-dimensional chemical-shift imaging in combinationExpand
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31P Transverse Relaxation Times of the ATP NMR Signals of Human Skeletal Muscle in Vivo
31P MRS examinations of the calf muscles of 12 healthy volunteers were performed to determine T2 of the coupled ATP signals by using the 90°–TE/2–2662‐TE/2‐acq selective spin‐echo sequence forExpand
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31P transverse relaxation times of ATP in human brain in vivo
31P MRS examinations of the brain of 10 healthy volunteers were performed to determine T2 of the coupled ATP signals by use of the localized 90° ‐ TE/2 ‐ 2662 ‐ TE/2 ‐ acq frequency selective spinExpand
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Relaxation of AB Spin Systems in Stimulated-Echo Spectroscopy
The behavior of the strongly coupled AB spin system during the STEAM (stimulated echo acquisition mode) sequence was calculated analytically. Relaxation during the TM interval, in which longitudinalExpand
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Computer-algebra calculations and measurements on AB spin systems for double-spin-echo sequences
The time evolution of the density operator of an AB spin system during a double-spin-echo pulse sequence is evaluated analytically by a computer-algebra system. The computer-algebra system allows oneExpand
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A pitfall associated with determination of transverse relaxation times of the 31P NMR signals of ATP using the Hahn spin‐echo
T2 measurements of 31P 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 theExpand
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Sequence parameters of double spin-echo sequences affect quantification of citrate.
Quantification of citrate by localized 1H spectroscopy is usually performed using the water signal as reference, but the signal behavior of the J-coupled AB spin system of citrate after multipulseExpand
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Pulse Angle Dependence of Double-Spin-Echo Proton NMR Spectra of Citrate—Theory and Experiments
The dependence of the signal of the strongly coupled AB spin system on the pulse angles in double spin-echo sequences was examined. Experimental1H NMR spectra of citrate were recorded on a 1.5 TExpand
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Influence of pulse angle variations onstimulated echo acquisition mode proton nuclear magnetic resonance spectra of AB spin systems: theory and experiments with citrate
The influence of pulse angle variations in the localization sequence stimulated echo acquisition mode (STEAM) on the signal of strongly coupled AB spin systems has been examined. Experimental1HExpand
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