Image quality parameters for the production standard Eliav PORTpro portal imaging device

Measurements of the high contrast spatial resolution and contrast-to-noise ratio of the production standard Eliav "PORTpro" portal imaging system have been made using a commercially available quality assurance phantom. The spatial resolution of the images is comparable with published data for other commercial systems, but somewhat lower than that published previously for the prototype of this system. These data may be of use to those involved in the selection, commissioning or quality assurance testing of electronic portal imaging systems.