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A constrained adaptive beamformer for medical ultrasound: Initial results

Publication ,  Conference
Mann, JA; Walker, WF
Published in: Proceedings of the IEEE Ultrasonics Symposium
December 1, 2002

Adaptive beamforming has been widely used as a way to improve image quality in medical ultrasound applications by correcting phase and amplitude aberration errors resulting from tissue inhomogeneity. A less-studied concern in ultrasound beamforming is the deleterious contribution of bright off-axis targets. This paper describes a new approach, the constrained adaptive bearnformer (CAB), which builds on classic array processing methods from radar and sonar. Given a desired frequency response for the mainlobe beam, the CAB reduces off-axis signals by imposing an optimal set of weights on the receive aperture. A linearly constrained adaptive filter dynamically adjusts the aperture weights in response to the incoming data. Initial results show a factor of two improvement in point target resolution and a 60% contrast improvement for low echogenicity cysts. The CAB could considerably improve cardiac and abdominal image quality. We address implementation issues and discuss future work.

Duke Scholars

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 2002

Volume

2

Start / End Page

1807 / 1810
 

Citation

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Mann, J. A., & Walker, W. F. (2002). A constrained adaptive beamformer for medical ultrasound: Initial results. In Proceedings of the IEEE Ultrasonics Symposium (Vol. 2, pp. 1807–1810).
Mann, J. A., and W. F. Walker. “A constrained adaptive beamformer for medical ultrasound: Initial results.” In Proceedings of the IEEE Ultrasonics Symposium, 2:1807–10, 2002.
Mann JA, Walker WF. A constrained adaptive beamformer for medical ultrasound: Initial results. In: Proceedings of the IEEE Ultrasonics Symposium. 2002. p. 1807–10.
Mann, J. A., and W. F. Walker. “A constrained adaptive beamformer for medical ultrasound: Initial results.” Proceedings of the IEEE Ultrasonics Symposium, vol. 2, 2002, pp. 1807–10.
Mann JA, Walker WF. A constrained adaptive beamformer for medical ultrasound: Initial results. Proceedings of the IEEE Ultrasonics Symposium. 2002. p. 1807–1810.

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 2002

Volume

2

Start / End Page

1807 / 1810