Now showing items 1-7 of 7

  • Rindal, Ole Marius Hoel; Rodriguez-Molares, Alfonso; Austeng, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    An undesired effect, the dark region artifact (DRA), has been under-communicated in our research community. The DRA appear next to acoustically strong targets for some of the many adaptive beamformers introduced in the ...
  • Prieur, Fabrice Jean Gabriel; Näsholm, Sven Peter; Austeng, Andreas; Holm, Sverre (Conference object / Konferansebidrag, 2010)
    The 10th European Conference on Underwater Acoustics (ECUA). 2010, Istanbul, Turkey. Mainstream sonars transmit and receive signals at the same frequency. As water is a nonlinear medium, a propagating signal generates ...
  • Hverven, Stine Myhre; Rindal, Ole Marius Hoel; Rodriguez-Molares, Alfonso; Austeng, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Adaptive beamformers aim for improved resolution and contrast in the ultrasound images, and their performance is typically benchmarked using metrics such as contrast ratio (CR) and contrast-to-noise ratio (CNR). Using ...
  • Lønmo, Tor Inge Birkenes; Austeng, Andreas; Hansen, Roy Edgar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Modern sonars provide high-resolution acoustic imaging for a range of applications, including pipeline inspection, harbor surveys and seabed mapping. Central in the signal processing of the sonar data is the beamforming, ...
  • Hverven, Stine Myhre; Rindal, Ole Marius Hoel; Hunter, Alan J.; Austeng, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    Background speckle can often obscure objects of interest in an ultrasound image. The probability of detection and classification of point scatterers is highly affected by background speckle. The proposed algorithm uses a ...
  • Prieur, Fabrice Jean Gabriel; Rindal, Ole Marius Hoel; Austeng, Andreas (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    The filtered delay multiply and sum (F-DMAS) beamformer has recently been presented in the context of medical ultrasound image formation. This nonlinear beamformer produces images with improved contrast resolution and noise ...
  • Rodriguez-Molares, Alfonso; Rindal, Ole Marius Hoel; Bernard, Olivier; Nair, Arun; Bell, Muyinatu A. Lediju; Liebgott, Herve; Austeng, Andreas; Løvstakken, Lasse (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We present the UltraSound ToolBox (USTB), a processing framework for ultrasound signals. USTB aims to facilitate the comparison of imaging techniques and the dissemination of research results. It fills the void of tools ...