EPR spectrometer for clinical applications
Open Access
- 28 September 2005
- journal article
- clinical trial
- Published by Wiley in Magnetic Resonance in Medicine
- Vol. 54 (5), 1317-1320
- https://doi.org/10.1002/mrm.20689
Abstract
This article describes an EPR spectrometer specifically designed and constructed for EPR spectroscopy in humans. The spectrometer is based on a permanent magnet, suitable for measurements at 1200 MHz. The magnet has a full 50 cm gap between the poles, which facilitates accurate and comfortable placement of the subject for the EPR measurement at any location on the human body. The bridge includes features to facilitate clinical operations, including an indicator for phasing of the reference arm and a 2 level RF amplifier. Resonators with holders for each type and site of measurement have been developed that comfortably position the resonator and the patient and prevent artifacts due to motion. The initial applications for which the spectrometer has been designed are for oximetry using loops on the surface, oximetry using implanted resonators for measuring deep sites, and measurements in the teeth for determination of exposures to clinically significant doses of ionizing radiation. Magn Reson Med, 2005.Keywords
This publication has 13 references indexed in Scilit:
- Measurements of clinically significant doses of ionizing radiation using non-invasive in vivo EPR spectroscopy of teeth in situApplied Radiation and Isotopes, 2005
- Clinical applications of EPR: overview and perspectivesNMR in Biomedicine, 2004
- Using EPR to Measure a Critical but Often Unmeasured Component of Oxidative Damage: OxygenAntioxidants and Redox Signaling, 2004
- An improved external loop resonator for in vivo L-band EPR spectroscopyJournal of Magnetic Resonance, 2003
- In Vivo EPR Imaging of the Distribution and Metabolism of Nitroxide Radicals in Human SkinJournal of Magnetic Resonance, 2001
- In vivo EPR dosimetry of accidental exposures to radiation: experimental results indicating the feasibility of practical use in human subjectsApplied Radiation and Isotopes, 2000
- The measurement of oxygenin vivousing EPR techniquesPhysics in Medicine & Biology, 1998
- A 1–2 GHz pulsed and continuous wave electron paramagnetic resonance spectrometerReview of Scientific Instruments, 1996
- Computer controlled in situ radiolysis electron spin resonance spectrometer incorporating magnetic field-microwave frequency lockingReview of Scientific Instruments, 1994
- In Vivo EPR Oximetry Using Two Novel Probes: Fusinite and Lithium PhthalocyanineAdvances in experimental medicine and biology, 1992