Single new processing algorithm to replace the standard dual image format in computed chest radiography

Commercially available computed radiography (CR) systems are configured to produce dual images on a single sheet of film. One image is mildly processed, while the other is heavily processed to enhance high-frequency detail and to reduce large-area contrast. The authors of this paper modified the standard processing to provide a single image that optimizes diagnostic detail in both the lungs and mediastinum. Normal and abnormal chest CRs (Toshiba 303A System) were analyzed by three chest radiologists. The effects of various image processing parameters were studied in each case. A new processing algorithm that retained large- area contrast in the lungs while enhancing mediastinal detail was selected for further evaluation. Preliminary observer performance tests suggest that use of the new single-image format does not significantly alter diagnostic accuracy. However, use of a single image has considerable practical benefits