Method and apparatus for estimating oxygen saturation of blood using magnetic resonance
US5233991A · kind A · utility
20Cited by
2References
15Claims
0Family size
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Key dates
| Filing date | Aug 8, 1991 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Aug 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/465
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The oxygen saturation of blood is determined by obtaining spin-spin relaxation time (T2.sub.b) of the fluid using magnetic resonance imaging techniques. A simplified model relates oxygen saturation of blood to measured spin-spin relaxation time. A pulse sequence is given for in vivo estimation of T2.sub.b including a plurality of 180.degree. refocusing RF signals which are equally spaced in time. The last refocusing pulse is slice selective. Fat signal is suppressed by initially using a short inversion recovery sequence followed by a frequency selective 90.degree. pulse that excites only water protons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.