A wall-less poly(vinyl alcohol) cryogel flow phantom with accurate scattering properties for transcranial Doppler ultrasound propagation channels analysis

Alexander J. Weir, Robin Sayer, Cheng Xiang Wang, Stuart Parks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Medical phantoms are frequently required to verify image and signal processing systems, and are often used to support algorithm development for a wide range of imaging and blood flow assessments. A phantom with accurate scattering properties is a crucial requirement when assessing the effects of multi-path propagation channels during the development of complex signal processing techniques for Transcranial Doppler (TCD) ultrasound. The simulation of physiological blood flow in a phantom with tissue and blood equivalence can be achieved using a variety of techniques. In this paper, poly (vinyl alcohol) cryogel (PVA-C) tissue mimicking material (TMM) is evaluated in conjunction with a number of potential scattering agents. The acoustic properties of the TMMs are assessed and an acoustic velocity of 1524ms-1, an attenuation coefficient of (0:49) × 10-4fdBm1Hz-1, a characteristic impedance of (1.72) × 106Kgm-2s-1 and a backscatter coefficient of (1.12) × 10-28f4m-1Hz-4sr-1 were achieved using 4 freeze-thaw cycles and an aluminium oxide (Al2O3) scattering agent. This TMM was used to make an anatomically realistic wall-less flow phantom for studying the effects of multipath propagation in TCD ultrasound.

Original languageEnglish
Title of host publication37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2015
PublisherIEEE
Pages2709-2712
Number of pages4
ISBN (Print)9781424492718
DOIs
Publication statusPublished - Nov 2015
Event37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2015 - Milan, Italy
Duration: 25 Aug 201529 Aug 2015

Conference

Conference37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2015
Abbreviated titleEMBC 2015
CountryItaly
CityMilan
Period25/08/1529/08/15

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Signal Processing
  • Biomedical Engineering
  • Health Informatics

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  • Cite this

    Weir, A. J., Sayer, R., Wang, C. X., & Parks, S. (2015). A wall-less poly(vinyl alcohol) cryogel flow phantom with accurate scattering properties for transcranial Doppler ultrasound propagation channels analysis. In 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2015 (pp. 2709-2712). IEEE. https://doi.org/10.1109/EMBC.2015.7318951