𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Relaxation times and NMR signals

✍ Scribed by Leon Axel


Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
738 KB
Volume
2
Category
Article
ISSN
0730-725X

No coin nor oath required. For personal study only.

✦ Synopsis


The strength of signals in magnetic resonance imaging (and the resulting image contrast) depends not just on the number density of the nuclei being detected, but also on the relaxation times, Z', and T2. The relationship of signal strength to relaxation time depends on the particular choice of pulse sequences used to produce the signals. The effects of the T, relaxation time on signal strength are discussed for the commonly used imaging techniques "partial saturation" and "inversion recoverv." Production of soin ethos and the effect of the T2 relaxation time on spin-echo signal strength are also discussed. " .


πŸ“œ SIMILAR VOLUMES


31P Transverse Relaxation Times of the A
✍ Wulf-Ingo Jung; Klaus Straubinger; Michael Bunse; Fritz Schick; Klaus KΓΌper; GΓΌn πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 339 KB πŸ‘ 1 views

## 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

A pitfall associated with determination
✍ Wulf-Ingo Jung; Klaus Straubinger; Michael Bunse; Stefan Widmaier; Fritz Schick; πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 391 KB πŸ‘ 1 views

## Abstract T~2~ measurements of ^31^P NMR signals of ATP using the Hahn 90°–180Β° spin‐echo sequence imply difficulties whenever the 180Β° 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

The longitudinal relaxation time (T1) of
✍ Lawrence S. Prince; Sandra K. Miller; Gerald M. Pohost; Gabriel A. Elgavish πŸ“‚ Article πŸ“… 1992 πŸ› John Wiley and Sons 🌐 English βš– 426 KB πŸ‘ 1 views

## Abstract Each of six perfused rat hearts was subjected to 30 min of hypoxia followed by 60 min of reoxygenation. Inversion‐recovery data on the intracellular Na NMR signal, differentiated by a shift reagent, 6 m__M__ Dy(PPP)~2~, were obtained every 5 min, and __T__~1~ values were calculated. The

In vivo measurements of NMR relaxation t
✍ Randall M. Kroeker; Elliot R. Mcveigh; Peter Hardy; Michael J. Bronskill; R. Mar πŸ“‚ Article πŸ“… 1985 πŸ› John Wiley and Sons 🌐 English βš– 703 KB

A series of solenoidal NMR probes were built to measure T I and T2 relaxation times in vivo in the mouse, over the frequency range of 5 to 60 MHz, using inversionrecovery and spin-echo pulse sequences. KHT tumors growing in the legs of C3H mice were studied and compared with normal mouse legs. The t

Sodium-23 NMR relaxation times in body f
✍ Hadassah Shinar; Gil Navon πŸ“‚ Article πŸ“… 1986 πŸ› John Wiley and Sons 🌐 English βš– 471 KB

23Na longitudinal and transverse NMR relaxation times were measured in human serum, plasma, cerebrospinal fluid (CSF), and solutions of plasma proteins. The magnetization decay curves could not be resolved into two exponentiak. A procedure to extract quantitative information from the measured relaxa