Axial lung window
Modality: CT (lung window)

- “ Patient with organizing pneumonia shows a reversed halo pattern (atoll sign) where there are focal round areas of ground-glass attenuation with su...”

Used in the following article:

  • Reversed halo sign (lungs) - “ Reversed halo sign, also known as the atoll sign, is defined as central ground-glass opacity surrounded by denser consolidation of crescentic shap...”

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