Rapid measurement of time-averaged blood flow using ungated spiral phase-contrast MRI
US6957097B2 · kind B2 · utility
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9References
18Claims
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Key dates
| Filing date | Apr 17, 2002 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Oct 16, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0263
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Pulsatile flow is measured using magnetic resonance imaging without cardiac gating using a phase-contrast excitation method to rapidly quantify blood flow and using a spiral k-space trajectory for image data read-out to mitigate deleterious effects of pulsatility. Post-processing of the read-out data provides a cumulative-average velocity plot from which a period of a cardiac cycle is obtained. Time-averaged blood flow rates can be rapidly and robustly measured and is more repeatable than conventional gated techniques.
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