Assessment of colour Doppler tissue imaging using test-phantoms.
An investigation has been carried out on the velocity resolution, spatial resolution and accuracy of Doppler images as part of a study into the Doppler display of cardiac tissue motion. Test-phantoms were designed to perform this work and images were captured on a computer. The characteristics of the phantom images and of the image capture process were studied. The smallest spatial detail that was observed in the Doppler image was 3 mm by 3 mm. Doppler receive gain and Doppler ensemble size both affected velocity resolution. Different target materials gave different measures for velocity resolution. This could be related to the different back-scatter intensities of the materials.
Fleming
A D
AD
Department of Medical Physics, Royal Infirmary of Edinburgh, Scotland, UK.
McDicken
W N
WN
Sutherland
G R
GR
Hoskins
P R
PR
D003198:Computer Simulation; D018618:Echocardiography, Doppler, Color; D018615:Ultrasonography, Doppler, Color