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Proceedings Paper

Oil-gel-based phantom for mimicking wave refraction of breast in ultrasound computed tomography
Author(s): Atsuro Suzuki; Yushi Tsubota; Wenjing Wu; Kazuhiro Yamanaka; Takahide Terada; Kenichi Kawabata
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Paper Abstract

In breast imaging by ultrasound CT, ultrasound is refracted owing to the difference of the sound speed between the breast and background water. The sound speed of a dense breast is higher than that of the water, while that of a fatty breast is lower than that of the water. In this study, we developed an oil-gel-based phantom for mimicking the wave refraction from the fatty breast to the dense breast. An oil gel was generated by adding SEBS (Styrene-Ethylene/Butylenes-Styrene, 10 wt%) to paraffin oil. The oil-gel-based phantom has a cylindrical shape and contains rod shaped inclusions which can be filled with salty water (3.5%). When temperature increases, the sound speed of water increases, while that of the oil gel decreases; the sound speeds of the oil gel were higher than those of the water at less than 20°C, while the sound speeds of the oil gel were lower than those of water at higher than 20°C. By controlling the temperature, the oil-gel-based phantom was able to simulate the refraction from the fatty breast (1476 [m/s]) to the dense breast (1559 [m/s]). For 43 days, the variation of the sound speed and attenuation of the oil gel in the reconstructed images were 0.7[m/s] and 0.03[dB/MHz/cm], respectively. This phantom with high temporal stability is suitable for multi-center distribution and may be used for standardization of data acquisition and image reconstruction across centers.

Paper Details

Date Published: 6 March 2018
PDF: 6 pages
Proc. SPIE 10580, Medical Imaging 2018: Ultrasonic Imaging and Tomography, 105800N (6 March 2018); doi: 10.1117/12.2292945
Show Author Affiliations
Atsuro Suzuki, Hitachi, Ltd. (Japan)
Yushi Tsubota, Hitachi, Ltd. (Japan)
Wenjing Wu, Hitachi, Ltd. (Japan)
Kazuhiro Yamanaka, Hitachi, Ltd. (Japan)
Takahide Terada, Hitachi, Ltd. (Japan)
Kenichi Kawabata, Hitachi, Ltd. (Japan)

Published in SPIE Proceedings Vol. 10580:
Medical Imaging 2018: Ultrasonic Imaging and Tomography
Neb Duric; Brett C. Byram, Editor(s)

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