کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10692960 | 1019751 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of beam steering in pulsed-wave ultrasound velocity estimation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effects of beam steering in pulsed-wave ultrasound velocity estimation Effects of beam steering in pulsed-wave ultrasound velocity estimation](/preview/png/10692960.png)
چکیده انگلیسی
Experimental and computer simulation methods have been used to investigate the significance of beam steering as a potential source of error in pulsed-wave flow velocity estimation. By simulating a typical linear-array transducer system as used for spectral flow estimation, it is shown that beam steering can cause an angle offset resulting in a change in the effective beam-flow angle. This offset primarily depends on the F-number and the nominal steering angle. For example, at an F-number of 3 and a beam-flow angle of 70°, the velocity error changed from â5% to + 5% when the steering angle changed from â20° to + 20°. Much higher errors can occur at higher beam-flow angles, with smaller F-numbers and greater steering. Our experimental study used a clinical ultrasound system, a tissue-mimicking phantom and a pulsatile waveform to determine peak flow velocity errors for various steering and beam-flow angles. These errors were found to be consistent with our simulation results. (E-mail: cobbold@ecf.utoronto.ca)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 8, August 2005, Pages 1073-1082
Journal: Ultrasound in Medicine & Biology - Volume 31, Issue 8, August 2005, Pages 1073-1082
نویسندگان
Aaron H. Steinman, Alfred C.H. Yu, K. Wayne Johnston, Richard S.C. Cobbold,