A method of correcting for the effect of temperature on low-contrast penetration measurement in urethane phantoms
Peake, Edward Warrington, Shaun Morgan, Paul S Gibson, Nicholas M
Peake, Edward
Warrington, Shaun
Morgan, Paul S
Gibson, Nicholas M
Abstract
Urethane-based test objects are routinely used for ultrasound quality assurance because of their durability and robustness. The acoustic properties of these phantoms including speed of sound and attenuation, however, have a strong dependence on temperature. Reliable measurement of low-contrast penetration, which is widely used for ultrasound system quality assurance testing, with these phantoms is therefore problematic. To alleviate this, a correction method was proposed using speed of sound estimated by measuring filament target separation. The method was developed using a range of 17 transducer geometry and frequency combinations across 5 ultrasound systems and validated using a further 5 systems. This was found to reduce the uncertainty of low-contrast penetration measurement from an average 17.6 mm to 4.9 mm over the temperature range 8degreeC to 32degreeC. This represents a greater than threefold improvement in precision of low-contrast penetration measurement. Copyright © 2019 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.
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Date
2019
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Peake, E., Warrington, S., Dudley, N.J., Morgan, P.S. and Gibson, N.M. (2019) 'A Method of Correcting for the Effect of Temperature on Low-Contrast Penetration Measurement in Urethane Phantoms', Ultrasound in medicine & biology, 45(6), pp. 1483-1488. doi: https://dx.doi.org/10.1016/j.ultrasmedbio.2019.02.012.