Publications [#132839] of G. Allan Johnson
- SE Hurlston, WW Brey, SA Suddarth, GA Johnson, A high-temperature superconducting Helmholtz probe for microscopy at 9.4 T.,
Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine, UNITED STATES, vol. 41 no. 5
pp. 1032-8, ISSN 0740-3194
(last updated on 2005/08/03)
The design and operation of a high-temperature superconducting (HTS) probe for magnetic resonance microscopy (MRM) at 400 MHz are presented. The design of the probe includes a Helmholtz coil configuration and a stable open-cycle cooling mechanism. Characterization of coil operating parameters is presented to demonstrate the suitability of cryo-cooled coils for MRM. Specifically, the performance of the probe is evaluated by comparison of signal-to-noise (SNR) performance with that of a copper Helmholtz pair, analysis of B1 field homogeneity, and quantification of thermal stability. Images are presented to demonstrate the SNR advantage of the probe for typical MRM applications.
Algorithms • Aluminum Oxide • Animals • Artifacts • Cold • Copper • Equipment Design • Heat • Helium • Image Processing, Computer-Assisted • Magnetic Resonance Imaging • Mice • Microscopy • Phantoms, Imaging • Radio Waves • Ruthenium Compounds • Sensitivity and Specificity • Signal Processing, Computer-Assisted • Thermal Conductivity • instrumentation • instrumentation*