The aim of this study was to evaluate the errors in measurement of volumetric flow rate and wall shear rate measured in radial and ulnar arteries using a commercial ultrasound scanning system. The Womersley equations were used to estimate the flow rate and wall shear rate waveforms, based on the measured vessel diameter and centerline velocity waveform. In the experiments, each variable (vessel depth, diameter, flow rate, beam-vessel angle and different waveform) in the phantom was investigated in turn, and its value was varied within a normal range while others were fixed at their typical values. The outcomes revealed that flow rate and wall shear rate were overestimated in all cases, from around 13% to nearly 50%. It is concluded that measurements of flow rate and wall shear rate in radial and ulnar arteries with a clinical ultrasound scanner are vulnerable to overestimation.
|Number of pages||9|
|Journal||Ultrasound in Medicine and Biology|
|Early online date||29 Dec 2015|
|Publication status||Published - Mar 2016|
- Doppler ultrasound
- Flow phantoms
- Flow rate
- Radial artery
- Ulnar artery
- Wall shear rate
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Student thesis: Doctoral Thesis › Doctor of PhilosophyFile