Abstract
Posteroanterior chest X-ray for the diagnosis of pneumothorax: methods, usage, and resolution Denise Rossato Silva, Sandra Jungblut Schuh, Paulo de Tarso Roth DalcinUniversidade Federal do Rio Grande do Sul, Porto Alegre-RS, BrazilAbstract: Most pneumothoraces are demonstrated on fully inspired erect posteroanterior (PA) chest X-ray (CXR). Expiratory films may have a role in the clinical management of patients with a small respiratory reserve in whom pneumothorax is suspected and not demonstrated on the inspiratory film. PA CXR can be used for the diagnosis of spontaneous and ­nonspontaneous pneumothoraces. When digital radiography is used, for most authors, a 2.5-lp/mm spatial ­resolution is satisfactory to detect a pneumothorax.Keywords: radiography, computed tomography, pneumothorax, posteroanterior chest X-ray
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