Abstract
A dual stage beamformer method for synthetic
aperture flow imaging has been developed. The motivation is
to increase the frame rate and still maintain a beamforming
quality sufficient for flow estimation that is possible to implement
in a commercial scanner. With the new method high
resolution images can be obtained continuously, which will
highly increase the frame rate. The flow velocity is estimated
by using a time-domain cross-correlation technique. The
approach is investigated through experiments with the SARUS
scanner (Synthetic Aperture Real-time Ultrasound System). A
flow rig generates a parabolic laminar flow, and the SARUS
scanner is used for acquiring the data from individual channels
of the transducer. The experimental results showed that
increasing the number of imaging lines used for the estimation
form 4 to 24 reduces the standard deviation from 21% to
7.6%. The parameter study showed that the number of crosscorrelation
functions for averaging and length of the search
range influence the performance.
Original language | English |
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Title of host publication | IFMBE Proceedings |
Editors | Kim Dremstrup, Steve Rees, Morten Ølgaard Jensen |
Number of pages | 280 |
Volume | 34 |
Publisher | Springer |
Publication date | 2011 |
Pages | 53-56 |
ISBN (Print) | 978-3-642-21682-4 |
Publication status | Published - 2011 |
Event | 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics - Aalborg, Denmark Duration: 14 Jun 2011 → 17 Jun 2011 Conference number: 15 http://www.dmts.dk/nbc15/ |
Conference
Conference | 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics |
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Number | 15 |
Country/Territory | Denmark |
City | Aalborg |
Period | 14/06/2011 → 17/06/2011 |
Internet address |
Keywords
- Synthetic aperture flow imaging
- Synthetic aperture sequential beamforming
- SARUS