High Resolution Ultrasound Imaging Using Adaptive Beamforming with Reduced Number of Active Elements

Iben Kraglund Holfort, Fredrik Gran, Jørgen Arendt Jensen

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

    Abstract

    In this paper, the adaptive, minimum variance ( MV) beamformer is applied to ultrasound data. Due to near-field properties, the energy of the ultrasound data reduces towards the edges of the transducer. The influence of this near-field effect is demonstrated, and a method to reduce this influence is proposed. By reducing the number of active sensor elements, an increased resolution can be obtained with the MV beamformer. This observation is directly opposite the well-known relation between the spatial extent of the aperture and the achievable resolution. The investigations are based on Field II simulated data using a 128-element transducer with a large spatial extent. The results show that an increased resolution can be obtained, when using only the central part of the transducer compared to using the entire spatial extent. Using the central 32 or 48 elements provides an increased resolution compared to using all 128 elements.
    Original languageEnglish
    Title of host publicationProceedings of the International Congress on Ultrasonics
    PublisherElsevier
    Publication date2009
    Pages659-665
    DOIs
    Publication statusPublished - 2009
    Event2009 International Congress on Ultrasonics - Santiago, Chile
    Duration: 11 Jan 200916 Jan 2009

    Conference

    Conference2009 International Congress on Ultrasonics
    Country/TerritoryChile
    CitySantiago
    Period11/01/200916/01/2009

    Keywords

    • Adaptive Array Processing
    • Adaptive Beamforming
    • High Resolution Beamforming;
    • Minimum Variance Beamforming;
    • Ultrasound Imaging

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