Fig. 15From: Evaluation of commercially available point-of-care ultrasound for automated optic nerve sheath measurementMean GCNR Butterfly iQ and Clarius L7HD across Contrast Targets and Gain. Each line is the mean GCNR value across triplicate images and represents the performance of an individual gain setting across contrast targets. Note, the line corresponding to the lowest gain setting (Gain 1) is not visible as the contrast targets were not distinguishable from background for both devicesBack to article page