✦ LIBER ✦

Effects of hematocrit and oxygen saturation level on blood spin-lattice relaxation

✍ Scribed by M. Johanna Silvennoinen; Mikko I. Kettunen; Risto A. Kauppinen

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 96 KB
Volume: 49
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.10370

No coin nor oath required. For personal study only.

✦ Synopsis

In the present study blood T(1) was determined as a function of hematocrit and oxygen saturation. T(1) showed a significant linear dependency on both of these parameters. In addition, oxygen dissolved in blood plasma in hyperoxygenated blood resulted in relaxation enhancement, comparable in size to that due to the change in oxygenation state of hemoglobin. As blood T(1) is a key factor for quantification of flow with arterial spin labeling methods, the influence of T(1) variation in the physiological range of hematocrit and oxygen saturation to flow determination is discussed.

📜 SIMILAR VOLUMES

The Effect of Molecular Oxygen on the Sp

The Effect of Molecular Oxygen on the Spin-Lattice Relaxation of Silicon in Condensed Sol-Gels

✍ R.A. Assink; R. Deshpande; D.M. Smith 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 475 KB

Dependence of the Multiple-Quantum EPR S

Dependence of the Multiple-Quantum EPR Signal on the Spin-Lattice Relaxation Time. Effect of Oxygen in Spin-Labeled Membranes

✍ H.S. Mchaourab; J.S. Hyde 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 494 KB

Effects of Off-Resonance Irradiation, Cr

Effects of Off-Resonance Irradiation, Cross-Relaxation, and Chemical Exchange on Steady-State Magnetization and Effective Spin–Lattice Relaxation Times

✍ Peter B Kingsley; W.Gordon Monahan 📂 Article 📅 2000 🏛 Elsevier Science 🌐 English ⚖ 161 KB

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)

Effects of age on apparent 31P spin–latt

Effects of age on apparent 31P spin–lattice relaxation times of rat brain phosphates

✍ J. A. Stolk; J. I. Oolsen; D. W. Alderman; M. P. Schweizer 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 283 KB

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, particu

Effects of aging on cerebral blood flow,

Effects of aging on cerebral blood flow, oxygen metabolism, and blood oxygenation level dependent responses to visual stimulation

✍ Beau M. Ances; Christine L. Liang; Oleg Leontiev; Joanna E. Perthen; Adam S. Fle 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 493 KB

## Abstract Calibrated functional magnetic resonance imaging (fMRI) provides a noninvasive technique to assess functional metabolic changes associated with normal aging. We simultaneously measured both the magnitude of the blood oxygenation level dependent (BOLD) and cerebral blood flow (CBF) respo

Effect of temperature on the spin-lattic

Effect of temperature on the spin-lattice relaxation times of aqueous solutions of ribonuclease and human serum albumin

✍ D. J. Blears; S. S. Danyluk 📂 Article 📅 1965 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 328 KB 👁 2 views

Aqueous solutions of ribonuclease and human serum albumin were subjected to periods of controlled heating and the nuclear magnetic spin-lattice relaxation times, 2'1, of the water protons measured. The heat treatment causes an initial increase in the relaxation times of the water protons. These TI v