I.- Chest Radiography.- The Normal Chest X-ray: An Approach to Interpretation.- II.- The Mediastinum and Hilar Regions.- Basic Patterns of Lung Disease.- Consolidation.- Collapse.- Lines.- Nodules.- Rings and Holes.- The Pleura.- Pleural Abnormalities.- Pleural Thickening and Calcification.- Pneumothorax.- Soft Tissues and Bony Structures.- Foreign Structures and Other Devices on Chest X-rays.- III.- Computed Tomography: Technical Information.- Computed Tomography (CT): Clinical Indications.