Conference paper
A phantom study on temporal and subband Minimum Variance adaptive beamforming
This paper compares experimentally temporal and subband implementations of the Minimum Variance (MV) adaptive beamformer for medical ultrasound imaging. The performance of the two approaches is tested by comparing wire phantom measurements, obtained by the research ultrasound scanner SARUS. A 7 MHz BK8804 linear transducer was used to scan a wire phantom in which wires are separated by 10 mm.
Performance is then evaluated by the lateral Full-Width-Half-Maximum (FWHM), the Peak Sidelobe Level (PSL), and the computational load. Beamformed single emission responses are also compared with those from conventional Delay-and-Sum (DAS) beamformer. FWHM measured at the depth of 46.6 mm, is 0.02 mm (0.09λ) for both adaptive methods while the corresponding values for Hanning and Boxcar weights are 0.64 and 0.44 mm respectively.
Between the MV beamformers a -2 dB difference in PSL is noticed in favor of the subband approach (-31 and -33 dB), whereas values from conventional are not lower than -29 dB. This slight improvement in the case of the subband implementation comes at the expense of increased computational cost; 3.7 TFLOPs per image are required in contrast to 130 GFLOPs of the temporal one, when only 0.5 GFLOPs are needed in DAS beamforming.
Language: | English |
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Publisher: | IEEE |
Year: | 2014 |
Pages: | 1702-1705 |
Proceedings: | 2014 IEEE International Ultrasonics Symposium |
ISBN: | 1479970484 , 1479970492 , 1479970506 , 9781479970483 , 9781479970490 and 9781479970506 |
Types: | Conference paper |
DOI: | 10.1109/ULTSYM.2014.0422 |
ORCIDs: | Jensen, Jørgen Arendt |
Aerospace Array signal processing BK8804 linear transducer Bioengineering Biomedical imaging Communication, Networking and Broadcast Technologies Components, Circuits, Devices and Systems Computing and Processing Covariance matrices Delay-and-Sum beamformer Engineered Materials, Dielectrics and Plasmas Fields, Waves and Electromagnetics MV adaptive beamformer Photonics and Electrooptics Power, Energy and Industry Applications Robotics and Control Systems SARUS Signal Processing and Analysis Transducers Ultrasonic imaging Wires array signal processing beamformed single emission responses biomedical ultrasonics computational load frequency 7 MHz frequency 7.0E+06 Hz medical ultrasound imaging peak sidelobe level phantom study phantoms research ultrasound scanner subband minimum variance adaptive beamforming temporal minimum variance adaptive beamforming ultrasonic transducer arrays wire phantom measurements