A comparison between image and signal sharpness-based axial localization of ultrasound scatterers

Konstantinos Diamantis, Paul A. Dalgarno, Tom Anderson, Jørgen Arendt Jensen, Vassilis Sboros

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Abstract

Super-resolution ultrasound imaging deploys contrast microbubble (MB) tracking to delineate micro-vessels. The potential application spans to a large number of diseases which cause compromised vascular networks. Current super resolution methods are mainly based on image processing. Sharpness-based localization is an alternative to such methods for scatterer localization in the axial direction, and can be implemented using both image and signal data. A 7-MHz, linear ultrasound transducer (lambda=212 mu m) and the Synthetic Aperture Real-time Ultrasound System (SARUS) were used to image a wire-target (point scatterer) at different depth positions. The method predicts a depth estimate and its difference from the true scatterer position demonstrates its accuracy. This average difference can be as low as 27.41 mu m (or approximate to lambda/8) for the image-derived sharpness and drops to 2.84 mu m (or approximate to lambda/75) when the signals are used. These figures were calculated for a 8 mm depth range, which can be extended subject to further processing. The process of image formation involves interpolation and logarithmic compression that reduce the overall performance of the method when using image data. Such details may be significant when reconstructing micro-vessels of the order of tens of micrometres in diameter.
Original languageEnglish
Title of host publicationProceedings of 2019 IEEE 16th International Symposium on Biomedical Imaging
Volume2019-April
PublisherIEEE
Publication date2019
Pages1610-1613
ISBN (Print)9781538636411
DOIs
Publication statusPublished - 2019
Event2019 IEEE 16th International Symposium on Biomedical Imaging - Hilton Molino Stucky, Venice, Italy
Duration: 8 Apr 201911 Apr 2019
https://biomedicalimaging.org/2019/

Conference

Conference2019 IEEE 16th International Symposium on Biomedical Imaging
LocationHilton Molino Stucky
CountryItaly
CityVenice
Period08/04/201911/04/2019
Internet address
SeriesInternational Symposium on Biomedical Imaging. Proceedings
ISSN1945-7928

Keywords

  • Axial localization
  • Multiple focusing
  • Sharpness
  • Super-resolution ultrasound
  • Ultrasound scatterers

Cite this

Diamantis, K., Dalgarno, P. A., Anderson, T., Jensen, J. A., & Sboros, V. (2019). A comparison between image and signal sharpness-based axial localization of ultrasound scatterers. In Proceedings of 2019 IEEE 16th International Symposium on Biomedical Imaging (Vol. 2019-April, pp. 1610-1613). IEEE. International Symposium on Biomedical Imaging. Proceedings https://doi.org/10.1109/ISBI.2019.8759225