J Lubbers1. 1. Department of BioMedical Engineering, University of Groningen, Bloemsingel 10, 9712 KZ, Groningen, The Netherlands. j.lubbers@med.rug.nl
Abstract
OBJECTIVE: To construct and apply a flow Doppler test object and its flow rig. METHODS: In this flow rig, particular attention was given to use of a long inlet length and to ensure the absence of disturbing particles. The latter was obtained by proper degassing, use of a filter and application of a fungicide. Two blood-mimicking fluids were used, with a viscosity of 4 and 8 mPa s respectively. RESULTS: Predictable Poiseuille flow profiles were obtained. The velocity range could be extended by increasing the viscosity of the blood-mimicking fluid. Predictable axial velocities up to 2.5 m/s were obtained in an 8-mm tube and 5 m/s in a 4-mm tube. CONCLUSION: Well-defined flow conditions that can be applied to investigate clinical ultrasound Doppler systems in a number of situations have been obtained.
OBJECTIVE: To construct and apply a flow Doppler test object and its flow rig. METHODS: In this flow rig, particular attention was given to use of a long inlet length and to ensure the absence of disturbing particles. The latter was obtained by proper degassing, use of a filter and application of a fungicide. Two blood-mimicking fluids were used, with a viscosity of 4 and 8 mPa s respectively. RESULTS: Predictable Poiseuille flow profiles were obtained. The velocity range could be extended by increasing the viscosity of the blood-mimicking fluid. Predictable axial velocities up to 2.5 m/s were obtained in an 8-mm tube and 5 m/s in a 4-mm tube. CONCLUSION: Well-defined flow conditions that can be applied to investigate clinical ultrasound Doppler systems in a number of situations have been obtained.
Authors: Ammar A Oglat; Nursakinah Suardi; M Z Matjafri; Mohammad A Oqlat; Mostafa A Abdelrahman; Ahmad A Oqlat Journal: J Med Ultrasound Date: 2018-05-07