کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10693206 | 1019762 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pressure-dependent attenuation with microbubbles at low mechanical index
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
It has previously been shown that the attenuation of ultrasound (US) by microbubble contrast agents is dependent on acoustic pressure (Chen et al. 2002). Although previous studies have modelled the pressure-dependence of attenuation in single bubbles, this paper investigates this subject by considering a bulk volume of bubbles together with other linear attenuators. Specifically, a new pressure-dependent attenuation model for an inhomogeneous volume of attenuators is proposed. In this model, the effect of the attenuation on US propagation is considered. The model was validated using experimental measurements on the US contrast agent Sonovue®. The results indicate, at low acoustic pressures, a linear relationship between the attenuation of Sonovue®, measured in dB, and the insonating acoustic pressure. (E-mail: mtang@robots.ox.ac.uk)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 3, March 2005, Pages 377-384
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 3, March 2005, Pages 377-384
نویسندگان
Meng-Xing Tang, Robert J. Eckersley, J.Alison Noble,