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Insights into Imaging
Fig. 18 | Insights into Imaging

Fig. 18

From: Chest imaging using signs, symbols, and naturalistic images: a practical guide for radiologists and non-radiologists

Fig. 18

Halo sign. The CT image shows the “halo sign” in a patient with angioinvasive aspergillosis: in the left lower lobe, it is possible to appreciate a round consolidation (black asterisk) with peripheral ground glass (white arrows), which suggests a hemorrhagic process. This ring or peripheral ground glass is similar to the sea’s appearance adjacent to an atoll

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