Doppler backscatter properties of a blood-mimicking fluid for Doppler performance assessment.
The Doppler backscatter properties of a blood-mimickig fluid (BMF) were studied to evaluate its suitability for use in a Doppler flow test object. Measurements were performed using a flow rig with C-flex tubing and BMF flow produced by a roller pump or a gear pump. A SciMed Doppler system was used to measure the backscattered Doppler power with a root-mean-square power meter connected to the audio output. Studies investigated the dependence of the backscattered Doppler power of the BMF with: circulation time; batch and operator preparations; storage; sieve size; flow speed; and pump type. A comparison was made with human red blood cells resuspended in saline. The backscatter properties are stable and within International Electrotechnical Commission requirements. The BMF is suitable for use in a test object for Doppler performance assessment.
Department of Medical Physics, University of Edinburgh, Royal Infirmary, UK. kramnarine@ed.ac.uk
K V
KV
Ramnarine
P R
PR
Hoskins
H F
HF
Routh
F
F
Davidson
D001769:Blood; D001783:Blood Flow Velocity; D001802:Blood Substitutes; D004912:Erythrocytes; D006801:Humans; D019047:Phantoms, Imaging; D012212:Rheology; D014465:Ultrasonics; D018608:Ultrasonography, Doppler
D001802:Blood Substitutes