Browsing NTNU Open by Author "Rodriguez-Molares, Alfonso"

Now showing items 1-9 of 9

    • 3D Myocardial Mechanical Wave Measurements: Toward In Vivo 3D Myocardial Elasticity Mapping 

      Salles, Sebastien; Espeland, Torvald; Rodriguez-Molares, Alfonso; Aase, Svein Arne; Hammer, Tommy; Støylen, Asbjørn; Aakhus, Svend; Løvstakken, Lasse; Torp, Hans (Peer reviewed; Journal article, 2020)
      Objectives This study aimed to investigate the potential of a novel 3-dimensional (3D) mechanical wave velocity mapping technique, based on the natural mechanical waves produced by the heart itself, to approach a noninvasive ...

    • A K-Space Filtering Technique for Vibration Sonoelastography 

      Henninen, Mikkel Øyvind (Master thesis, 2016)
      The aim of this project was to investigate the feasibility of a k-space filtration technique to produce elasticity maps with stationary vibration fields. The method was implemented in a MATLAB routine and tested against ...

    • Improved Lesion Detection Using Nonlocal Means Post-Processing 

      Rindal, Ole Marius Hoel; Rodriguez-Molares, Alfonso; Måsøy, Svein-Erik; Bjåstad, Tore Grüner (Journal article; Peer reviewed, 2019)
      Software beamforming allows more flexible and complex algorithms, often referred to as adaptive beamforming techniques, that are blurring the boundaries between beamforming and image processing. Many adaptive beamforming ...

    • In Vitro Setup for Coronary Circulation with Ventricular Motion 

      Garcia Mayuri, Alyssa Ninoska (Master thesis, 2017)
      Blood and tissue motion can be detected using Doppler ultrasound. However, in a complex system such as the human body, the blood is not the only matter in motion. Doppler signals reflected by blood are often disturbed by ...

    • On the origin of clutter in echocardiography and possible solutions 

      Fatemi, Ali (Doctoral theses at NTNU;2022:41, Doctoral thesis, 2022)

    • Studying the Origin of Reverberation Clutter in Echocardiography: In Vitro Experiments and In Vivo Demonstrations 

      Fatemi, Ali; Berg, Erik Andreas Rye; Rodriguez-Molares, Alfonso (Peer reviewed; Journal article, 2019)
      Clutter in echocardiography hinders the visualization of the heart and reduces the diagnostic value of the images. The detailed mechanisms that generate clutter are, however, not well understood. We present five different ...

    • The dark region artifact in adaptive ultrasound beamforming 

      Rindal, Ole Marius Hoel; Rodriguez-Molares, Alfonso; Austeng, Andreas (Journal article; 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 ...

    • The influence of speckle statistics on contrast metrics in ultrasound imaging 

      Hverven, Stine Myhre; Rindal, Ole Marius Hoel; Rodriguez-Molares, Alfonso; Austeng, Andreas (Journal article; 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 ...

    • The UltraSound ToolBox 

      Rodriguez-Molares, Alfonso; Rindal, Ole Marius Hoel; Bernard, Olivier; Nair, Arun; Bell, Muyinatu A. Lediju; Liebgott, Herve; Austeng, Andreas; Løvstakken, Lasse (Journal article; 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 ...