VALIDATION OF A NEW BLOOD-MIMICKING FLUID FOR USE IN DOPPLER FLOW TEST OBJECTS

A blood-mimicking fluid (BMF) suitable for use in Doppler flow test ob jects is described and characterised, The BMF consists of 5 mu m diame ter nylon scattering particles suspended in a fluid base of water, gly cerol, dextran and surfactant, The acoustical properties of various BM F preparations were measured under uniform flow to study the effects o f particle size, particle concentration, surfactant concentration, flo w rate and stability, The physical properties, (density, viscosity and particle size), and acoustical properties (velocity, backscatter and attenuation) of the BR-IF are within draft International Electrotechni cal Commission requirements. (C) 1998 World Federation for Ultrasound in Medicine & Biology.