title: [Development of resonators for an ESR/NMR hybrid imaging system].
abstract: An ESR/NMR resonator for hybrid imaging system was fabricated. It consisted of an ESR resonator, a bridged loop-gap resonator (inner diameter, 43 mm; axial length, 10 mm), and an NMR resonator, an LC circuit of a solenoid coil (inner diameter, 60 mm; axial length, 10 mm) and variable capacitor. The former was located inside the latter. The resonant frequencies of ESR and NMR were 730 and 27 MHz, respectively. An ESR/NMR hybrid spectrometer was constructed for homodyne detection and lock-in detection of ESR and NMR signals. By using the ESR/NMR resonator and spectrometer, CW-ESR, CW-NMR, and pulsed NMR measurements of a phantom that included a physiological saline solution containing a nitroxide radical could be made at the magnetic field of 26 mT and 640 mT.
authors.affiliation: Institute of Life Support Technology, 2-2-1, Matsuei, Yamagata-shi, 990-2473, Japan. yokohide@fmu.ac.jp
authors.forename: Hidekatsu
authors.initials: H
authors.lastname: Yokoyama
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Sato
authors.forename: Tateaki
authors.initials: T
authors.lastname: Ogawa
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Tsuchihashi
authors.forename: Fumio
authors.initials: F
authors.lastname: Shishido
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D004867:Equipment Design; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D019047:Phantoms, Imaging