NMR resonators optimized for high Q factor
US6667674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Apr 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/34046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A birdcage resonator has a pair of conductor rings separated from each other along a central axis and a plural number of axially disposed conductor rungs, which extend between the rings and are evenly spaced around the central axis. Each of the rungs has a sectional shape with thickness or a radial extension comparable to or greater than its width or its azimuthal extension. Measures of the width and thickness of the rungs may be determined by using them as parameters to calculate the values of Q factor from an analytical procedure to locate parameter value ranges corresponding to maximal Q. Geometric calculations for filling factor yield ranges of parameters providing for compromise parameter values. Saddle coils have been found to exhibit similar enhancement of Q with radially oriented conductor cross section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.