Journal article
Velocity magnitude estimation with linear arrays using Doppler bandwidth
Ultrasonics, v 39(3)
2001
PMID: 11349996
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The dependence of pulsed wave Doppler bandwidth on parameters typical of linear transducer arrays used in commercial Duplex and color flow mapping systems is investigated experimentally. For a single flow line it is observed that this bandwidth generally depends not only on the scatterer velocity and the beam-to-flow angle, but also on the flow line range and orientation. This is due to the fact that in Duplex and color flow systems the transducer is differently focused in the scan and elevation planes and its aperture and focal lengths are often made to vary, depending on the distance of the flow line from the transducer. It is however experimentally demonstrated that, at points where the ultrasound beamwidths in the scan and elevation planes are both comparable to the sample volume length, the Doppler bandwidth is independent of the beam-to-flow angle. It is also shown that this invariance can be extended to other ranges by appropriately modifying the array aperture. Finally, as an application of this independence, the flow-line velocity magnitude in these beam regions is estimated with better than 5% uncertainty through a simple bandwidth measurement.
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Details
- Title
- Velocity magnitude estimation with linear arrays using Doppler bandwidth
- Creators
- Piero Tortoli - University of FlorenceGabriele Guidi - University of FlorenceLuca Mantovani - Sirio Panel SpA, S. Casciano Val di Pesa, Florence, ItalyVernon L. Newhouse - Drexel University
- Publication Details
- Ultrasonics, v 39(3)
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- [Retired Faculty]
- Web of Science ID
- WOS:000168356000002
- Scopus ID
- 2-s2.0-0035297704
- Other Identifier
- 991019167653104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Acoustics
- Radiology, Nuclear Medicine & Medical Imaging