A METHOD OF CORRECTING FOR THE EFFECT OF TEMPERATURE ON LOW-CONTRAST PENETRATION MEASUREMENT IN URETHANE PHANTOMS

被引：1
|
作者：
Peake, Edward [1 ]
Warrington, Shaun [1 ]
Dudley, Nicholas J. [2 ]
Morgan, Paul S. [1 ]
Gibson, Nicholas M. [1 ]
机构：
[1] Nottingham Univ Hosp NHS Trust, Med Phys & Clin Engn, Queens Med Ctr, Derby Rd, Nottingham NG7 U2H, England
[2] United Lincolnshire Hosp NHS Trust, Radiat Protect & Radiol Phys, Lincoln, England
来源：
ULTRASOUND IN MEDICINE AND BIOLOGY | 2019年 / 45卷 / 06期
关键词：
Ultrasound quality assurance; Urethane test object; Low-contrast penetration; Depth of penetration; TEST OBJECTS;
D O I：
10.1016/j.ultrasmedbio.2019.02.012
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
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 8 degrees C to 32 degrees C. This represents a greater than threefold improvement in precision of low-contrast penetration measurement. (E-mail: nick.gibson@nuh.nhs.uk) (C) 2019 World Federation for Ultrasound in Medicine & Biology. All rights reserved.
引用
收藏
页码：1483 / 1488
页数：6
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