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Fig. 3C. —20-year-old man with primary tuberculosis. Series of otherwise identical (600 dpi [dots per inch], 3.7 MB [megabytes] [A]; 300 dpi, 968 KB [kilobytes] [B]; 150 dpi, 252 KB [C]; 72 dpi, 68 KB [D]; 30 dpi, 24 KB [E]) single chest radiographs show effect of differing levels of resolution on appearance of printed digital image with identical physical size and on size of image file. All images were saved as uncompressed TIFF (tagged image file format) files and sampled from original image obtained from our PACS (picture archiving and communication system) workstation. Apparent quality is influenced by monitor on which images are displayed or by printer output.