Dual resolution acquisition of magnetic resonance angiography data with vessel segmentation
US6556856B1 · kind B1 · utility
26Cited by
8References
10Claims
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Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jun 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/5619
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic resonance angiogram (MRA) is acquired using a contrast enhancement method in which a series of low resolution NMR images are rapidly acquired during a time resolved phase of the examination in which the contrast bolus makes a first pass through the arteries and veins. Additional, high spatial resolution NMR image data is acquired in a subsequent steady-state phase of the examination. The low resolution NMR image is segmented and masked to depict only arteries, and the central k-space region of this data is combined with the peripheral k-space data portion of the high resolution NMR data to produce one or more images.
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