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

doi:10.1109/EMBC.2015.7318951

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 proceeding › Conference 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 language	English
Title of host publication	37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2015
Publisher	IEEE
Pages	2709-2712
Number of pages	4
ISBN (Print)	9781424492718
DOIs	https://doi.org/10.1109/EMBC.2015.7318951
Publication status	Published - Nov 2015
Event	37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2015 - Milan, Italy Duration: 25 Aug 2015 → 29 Aug 2015

Conference

Conference	37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2015
Abbreviated title	EMBC 2015
Country	Italy
City	Milan
Period	25/08/15 → 29/08/15

ASJC Scopus subject areas

Computer Vision and Pattern Recognition
Signal Processing
Biomedical Engineering
Health Informatics

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10.1109/EMBC.2015.7318951

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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

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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.",

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Weir, AJ, Sayer, R, Wang, CX & 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. IEEE, pp. 2709-2712, 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society 2015, Milan, Italy, 25/08/15. https://doi.org/10.1109/EMBC.2015.7318951

A wall-less poly(vinyl alcohol) cryogel flow phantom with accurate scattering properties for transcranial Doppler ultrasound propagation channels analysis. / Weir, Alexander J.; Sayer, Robin; Wang, Cheng Xiang; Parks, Stuart.

37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2015. IEEE, 2015. p. 2709-2712.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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