In vivo mesurements of longitudinal relaxation time by a pulsed longitudinally detected ESR spectrometer
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چکیده
منابع مشابه
A longitudinally detected high-field ESR spectrometer for the measurement of spin-lattice relaxation times.
We describe a high-field longitudinally detected electron spin resonance (LOD-ESR) spectrometer operating at 35 and 75 GHz. The lack of resonant microwave circuits facilitates operation at different microwave frequencies without changing the probehead. A very low noise radio frequency detection compensates partially the resulting low sensitivity. The major elements of the LOD-ESR spectrometer a...
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Very strong magnetic fields are needed to study magnetic resonances that are broadened by impurities, lattice deformation or other interactions such as the exchange energy in antiferromagnets. Certain phenomena that can be studied by means of magnetic resonances will occur only at very high magnetic fields, such as magnetic field induced phase transitions in the crystal lattice or in the arrang...
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Background To report normal variations of the limbal structures using in vivo laser scanning confocal microscopy. Methods: This was a retrospective study of fourteen eyes from 11 healthy individuals. Confocal imaging of cornea and limbus was performed using Heidelberg Retina Tomograph III Rostock Corneal Module. Results: The typical structure of the palisades of Vogt (POV) was detected ...
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The technique of pulsed Fourier transform NMR spectroscopy is well developed and understood. The equivalent technique for ESR has been slower to be developed, but recent developments in ESR instrumentation have now made FT ESR possible. In this paper we consider the requirements for rotating the magnetization associated with an ESR spectrum by a microwave pulse. In addition, techniques for reco...
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PURPOSE Relaxation time constants are useful as markers of tissue properties. Imaging ex vivo tissue is done for research purposes; however, T1 relaxation time constants are altered by tissue fixation in a time-dependent manner. This study investigates regional changes in T1 relaxation time constants in ex vivo brain tissue over 6 months of fixation. METHODS Five ex vivo human brain hemispher...
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ژورنال
عنوان ژورنال: Seibutsu Butsuri
سال: 2001
ISSN: 0582-4052,1347-4219
DOI: 10.2142/biophys.41.s86_3