Crucial but Often Unrecognized Radiologic Signs in Thoracic Imaging: Part 2

Despite its limitations and the availability of more sophisticated cross-sectional imaging tools, chest radiography is the most frequently ordered and performed imaging examination in the world. The clinical utility of chest radiography is related to its widespread availability, cost-effectiveness, and low radiation dose, and it affords radiologists the ability to rapidly diagnosis a broad range of cardiopulmonary diseases and entities unsurpassed by any laboratory test. However, the accurate interpretation of chest radiographs is challenging. The thorax is a complex 3D organ system with numerous superimposed anatomic structures that can obscure the visualization of subtle and nonspecific disease findings being evaluated by a 2D imaging modality. The recognition of such findings is paramount if patients are to receive additional lifesaving imaging and treatment before the underlying disease progresses. Knowledge of key radiologic signs in thoracic imaging assists radiologists in the recognition of underlying disease processes that may otherwise adversely impact patient care. This Case-Based Review concludes the two-part series highlighting key chest radiographic signs radiologists must know and recognize.