## Abstract An inversion‐recovery pulse sequence and solenoidal surface coil were employed to determine the spin‐lattice relaxation time (T1) in murine tumors (RIF‐1 and SCCVII). Reduction in T1s of inorganic phosphate (P~i~) and nucleotide triphosphates (NTP) has been observed in irradiated tumors
Effects of age on apparent 31P spin–lattice relaxation times of rat brain phosphates
✍ Scribed by J. A. Stolk; J. I. Oolsen; D. W. Alderman; M. P. Schweizer
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 283 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Apparent 31P spin-lattice relaxation times have been measured in vivo for brain phosphates in young adult, mature adult, and aged rats at 4.7 T and 35 degrees C. Statistically significant differences were found for most phosphate species, except PCr and gamma-ATP, among the three age groups, particularly between the young and mature adults. Age-related changes in tissue composition and exchange reactions are discussed as possible contributors to these results.
📜 SIMILAR VOLUMES
In the presence of an off-resonance radiofrequency field, recovery of longitudinal magnetization to a steady state is not purely monoexponential. Under reasonable conditions with zero initial magnetization, recovery is nearly exponential and an effective relaxation rate constant R(1eff) = 1/T(1eff)