CTICasesDR detector equalization artifact concealing left lower lobe consolidation
Imaging findings
Chest radiograph shows minimal, subtle basilar atelectasis, while a contemporaneous chest CT shows complete, dense, severe consolidation of the left lower lobe. This mismatch is due to digital processing algorithms equalizing the grayscale across the chest.
Key takeaways
Digital radiography (DR) processing software is designed to optimize visibility by equalizing densities. However, this can inadvertently mask severe, dense lobar consolidation (especially in the left lower lobe behind the heart) on frontal projections.
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