Reducing image size leads to deterioration in lung nodule detection on CT scans viewed at fixed viewing distances. This can be overcome by allowing the observer to compensate for smaller images by adjusting the viewing distance. While a detailed presentation of each individual performance may not be of interest to the typical reader of Radiology , we have made this data available on BrighamRAD for interested investigators. This Web presentation demonstrates that the performance trends of individuals track the mean performance. Upper curve demonstrates results of variable viewing distance protocol with relatively constant performance with increasing image format densities.
Lower curve demonstrates declining performance in the fixed viewing distance protocol.
The error bars are the standard deviation of mean for all the trials. Upper curve demonstrates results of variable viewing distance protocol with relatively constant performance with increasing image format densities. Lower curve demonstrates declining performance in the fixed viewing distance protocol. The error bars are the standard deviation of mean for all the trials.