In ARDS imaging findings, which description best characterizes the typical radiographic findings?

• A. Pneumothorax
• B. Pleural effusion
• C. Diffuse alveolar edema with partial air-space filling
• D. Consolidation

Answer: (D)

The main idea is that ARDS causes diffuse, noncardiogenic edema that fills alveoli across both lungs, leading to widespread air-space opacities on the chest radiograph. When the alveoli are filled with fluid and inflammatory cells, those regions look like consolidation because the normally air-filled spaces are now opaque. In ARDS, this pattern is typically bilateral and confluent rather than localized, reflecting the diffuse nature of the alveolar filling.

Pneumothorax would present as a visible pleural line with absent markings beyond it, which isn’t the characteristic ARDS pattern. Pleural effusions, while they can occur, usually show layering and blunting of the costophrenic angles and don’t define ARDS imaging. The defining feature here is the diffuse alveolar filling that produces consolidative opacities throughout the lungs, which is why this description best fits ARDS imaging.