Rapid NMR imaging system
US4748410A · kind A · utility
26Cited by
3References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Aug 6, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/561
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The magnetic resonance activity of a region of a volume is imaged using a time varying gradient whose integral provides a constant velocity spiral in the spatial frequency domain. To provide high fidelity for relatively low values of T.sub.2, high SNR for relatively high values, and a T.sub.2 sensitive image, the spiral is retraced back to the origin. The gradient requirements are minimized using a sequence of interleaved spirals using separate excitations. For further time reduction, only half the spatial frequency domain can be scanned, using inversion excitations to reduce the effects of inhomogeneity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.