Accuracy of spectral Doppler flow and tissue velocity measurements in ultrasound systems

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• 作者：Walker ; Andrew ; Olsson ; Eva ; Wranne ; Bengt ; Ringqvist ; Ivar ; Ask ; Per
• 关键词：Ultrasound system ; Doppler ; Velocity ; Accuracy ; Doppler phantom ; Calibration ; Echocardiography
• 刊名：Ultrasound in Medicine and Biology
• 出版年：2004
• 出版时间：January, 2004
• 年：2004
• 卷：30
• 期：1
• 页码：127-132
• 全文大小：261 K

文摘

Blood and tissue velocity are measured and analysed in cardiac, vascular and other applications of diagnostic ultrasound (US). An error in system calibration is a potential risk for misinterpretation of the measurements. To determine the accuracy in velocity calibration, we tested three common commercial US systems using a Doppler string phantom. We tested pulsed and continuous-wave Doppler modes for velocities relevant to both cardiac blood flow and tissue-velocity estimation. The US systems were tested with settings and transducers commonly used in cardiac applications. One system consistently overestimated velocity by about 5 % , whereas the other two systems were quite accurate in velocity estimation. These findings emphasize the importance of continuous quality control of US equipment. (E-mail: mailto:andrew.walker@ltvastmanland.se)