A phantom study on temporal and subband Minimum Variance adaptive beamforming

Konstantinos Diamantis, Iben Holfort Voxen, Alan H. Greenaway, Tom Anderson, Jørgen Arendt Jensen, Vassilis Sboros

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


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.
Original languageEnglish
Title of host publicationProceedings of the 2014 IEEE International Ultrasonics Symposium
Publication date2014
ISBN (Electronic)978-1-4799-7049-0
Publication statusPublished - 2014
Event2014 IEEE International Ultrasonics Symposium - Hilton Hotel, Chicago, IL, United States
Duration: 3 Sep 20146 Sep 2014


Conference2014 IEEE International Ultrasonics Symposium
LocationHilton Hotel
CountryUnited States
CityChicago, IL


  • array signal processing
  • biomedical ultrasonics
  • phantoms
  • ultrasonic transducer arrays
  • Aerospace
  • Bioengineering
  • Communication, Networking and Broadcast Technologies
  • Components, Circuits, Devices and Systems
  • Computing and Processing
  • Engineered Materials, Dielectrics and Plasmas
  • Fields, Waves and Electromagnetics
  • Photonics and Electrooptics
  • Power, Energy and Industry Applications
  • Robotics and Control Systems
  • Signal Processing and Analysis
  • frequency 7.0E+06 Hz
  • Array signal processing
  • beamformed single emission responses
  • Biomedical imaging
  • BK8804 linear transducer
  • computational load
  • Covariance matrices
  • Delay-and-Sum beamformer
  • frequency 7 MHz
  • medical ultrasound imaging
  • MV adaptive beamformer
  • peak sidelobe level
  • phantom study
  • research ultrasound scanner
  • subband minimum variance adaptive beamforming
  • temporal minimum variance adaptive beamforming
  • Transducers
  • Ultrasonic imaging
  • wire phantom measurements
  • Wires

Cite this

Diamantis, K., Voxen, I. H., Greenaway, A. H., Anderson, T., Jensen, J. A., & Sboros, V. (2014). A phantom study on temporal and subband Minimum Variance adaptive beamforming. In Proceedings of the 2014 IEEE International Ultrasonics Symposium (pp. 1702-1705). IEEE. https://doi.org/10.1109/ULTSYM.2014.0422