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Fig. 2C —Clustered bar charts show extent and severity of chest injuries that were diagnosed on MDCT but missed on conventional radiography. Number and severity of pneumothoraces (A), hemothoraces (B), and pulmonary contusions (C), and number of rib fractures (D) are shown for both selective MDCT algorithm (black bars) and routine MDCT algorithm (white bars). Differences between black and white bars illustrate number of injuries that would have been missed if only selective MDCT algorithm had been used. One patient could have more injures. Number of patients with rib fractures includes patients in whom presence of rib fractures was already diagnosed at conventional radiography but in whom there was discrepancy in number of rib fractures.