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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sasso, M. Cohen-Bacrie, C. |
| Copyright Year | 2005 |
| Description | Author affiliation: Philips Res., Briarcliff Manor, NY, USA (Sasso, M.; Cohen-Bacrie, C.) |
| Abstract | Medical ultrasound beamforming is conventionally done using a classical delay-and-sum operation. This simplest beamforming suffers from drawbacks. Indeed, in phased array imaging, the beamformed radiofrequency signal is often polluted with off-axis energies. We investigate the use of an adaptive beamforming approach widely used in array processing, the fully adaptive beamformer, to reduce the bright off-axis energies contribution. We show that the fully adaptive beamformer cannot be applied to medical ultrasound as it was initially derived since the medical ultrasonic medium produces coherent or highly correlated signals and the algorithm fails to work within this context. Spatial smoothing preprocessing is introduced which allows the fully adaptive beamformer to operate. A complementary preprocessing that uses the received data obtained using consecutive transmission lines further improve the performances. Very promising results for the application of adaptive array processing techniques in medical ultrasound are obtained. |
| Sponsorship | IEEE Signal Processing Soc |
| File Size | 1977371 |
| File Format | |
| ISBN | 0780388747 |
| ISSN | 15206149 |
| DOI | 10.1109/ICASSP.2005.1415448 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-03-23 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Ultrasonic imaging Biomedical imaging Array signal processing Covariance matrix Sensor arrays Transmission line matrix methods Delay Phased arrays Power transmission lines Power generation |
| Content Type | Text |
| Resource Type | Article |
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