When evaluating a cardiac CT, reading physicians must systematically review the lung fields and mediastinum for incidental pathologies. These are the high-yield categories you should be looking for on every read.
The sensitivity of detecting small, scattered pulmonary nodules can be substantially improved by using Maximum Intensity Projections (MIP) during post-processing.
See Reconstruction views for the broader MPR / MIP / VR primer.
If cystic air spaces are identified in the lungs, internal morphology offers a diagnostic clue:
- Cysts with a central “dot” → characteristic of emphysema (the dot is the centrilobular vessel)
- Cysts lacking a central dot → more indicative of collagen vascular diseases, lymphoma, or HIV
Frequently seen incidentally on cardiac CTs. Left ventricular failure manifests in the lungs as:
- Diffuse ground-glass opacities
- Smooth interlobular septal thickening (Kerley B lines)
- Peribronchial cuffing
- Bilateral pleural effusions
Inflammatory or infectious conditions in the mediastinum present as distinct thickening and increased attenuation of the mediastinal fat. High clinical mortality — flag it.