Most missed findings on a chest radiograph are not subtle; they are in places the eye does not go once it has found something interesting. The classic review areas are the apices above the clavicles, the region behind the heart, the lung bases below the domes of the diaphragm, the hila, the bones, and the soft tissues of the neck, axillae and chest wall.
The discipline is to work them in the same order every time and to work them after forming an impression, not instead of one. Satisfaction of search is the specific failure: a reader who has identified a consolidation stops looking, and the second finding — a rib lesion, a small pneumothorax at the apex, free gas under the diaphragm — is never sought. Working a fixed checklist after the primary read is what protects against it.
The lateral view, where one exists, earns its place mainly in the retrocardiac and retrosternal spaces and in the posterior costophrenic recesses. And check the edges of the image and the technical adequacy before anything else: a film that is rotated, underpenetrated or clipped at the costophrenic angles gives answers that will be acted on regardless of whether it could have given them.
- Assess rotation, penetration and whether the costophrenic angles are included before interpreting anything
- Work a fixed review-area sequence after forming your impression, not instead of it
- Cover apices above the clavicles, retrocardiac region, bases below the diaphragm, hila, bones and soft tissues every time
- Treat a positive finding as a prompt to keep looking rather than as a reason to stop — satisfaction of search is the commonest miss
- Use the lateral view for the retrocardiac and retrosternal spaces and the posterior costophrenic recesses
Why it matters
The finding most often missed is the one that comes after the finding that was made.
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