A novel array processing method for precise depth detection of ultrasound point scatter

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

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

Abstract

A signal based algorithm resulting in increased depth resolution is presented for medical ultrasound. It relies on multiple foci beamforming that is enabled by current ultrasound imaging systems. The concept stems from optical microscopy and is translated here into ultrasound using the Field II simulation software. A 7 MHz linear transducer is used to scan a single point scatterer phantom that can move in the axial direction. Individual beamformer outputs from 3 different foci are post-processed using the highly-dependent on focusing errors, metric of sharpness to estimate the position of the point scatter. A 37.8 μm uncertainty in depth estimation is achieved, which attains an almost 3-fold improvement compared to conventional ultrasound imaging axial resolution. Future work on the development of this algorithm requires experimental validation in tissue-like materials that provide strong aberrations.
Original languageEnglish
Title of host publicationProceedings of 2016 IEEE International Conference on Acoustics, Speech and Signal Processing
PublisherIEEE
Publication date2016
Pages669-673
ISBN (Print)978-1-4799-9988-0
DOIs
Publication statusPublished - 2016
Event41st IEEE International Conference on Acoustics, Speech, and Signal Processing - Shanghai, China
Duration: 20 Mar 201625 Mar 2016
Conference number: 41

Conference

Conference41st IEEE International Conference on Acoustics, Speech, and Signal Processing
Number41
CountryChina
CityShanghai
Period20/03/201625/03/2016

Keywords

  • Ultrasound imaging
  • Beamforming
  • Multiple focusing
  • Depth-resolution
  • Normalized sharpness

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