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File:Chest X-ray of patchy opacities of pulmonary tuberculosis.jpg|Chest x-ray showing patchy opacification on the upper right and mid-zone lung with fibrotic shadows, as well as bilateral hilar lymphadenopathy.
File:Chest X-ray reticulonodular densities post-primary pulmonary tuberculosis.jpg|Chest x-ray showing coarse reticulonodular densities on the lower right lung of post-primary pulmonary TB.
File:Chest x-ray of Ghon's complex of active tuberculosis.jpg|Chest x-ray of [[Ghon's complex]] of active tuberculosis. A Ghon's complex consists of a calcified focus of infection and an associated lymph node.
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2. Any cavitary lesion - Lucency (darkened area) within the lung parenchyma, with or without irregular margins that might be surrounded by an area of airspace consolidation or infiltrates, or by nodular or fibrotic (reticular) densities, or both. The walls surrounding the lucent area can be thick or thin. Calcification can exist around a cavity.
