Question
The CT Scan of Chest Shows the Following . Probable Diagnosis ?
A. Blastomycosis
B. Bronchogenic carcinoma
C. Invasive aspergillosis
D. Bronchiectasis
Show Answer
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Correct Answer » D Explanation |
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Signet ring sign
- The signet ring sign is a CT finding seen in patients with Bronchiectasis
- The ring of soft-tissue attenuation represents the wall of the dilated bronchus seen on a cross-sectional CT scan, whereas the low-attenuating circle of air represents air within the dilated bronchus.
- The circle of soft-tissue attenuation abutting the ring represents a cross-sectional image of the pulmonary artery that lies adjacent to the dilated bronchus.