CTICasesHyperdense Pulmonary Embolism on Non-Contrast CT
Imaging findings
Non-contrast chest CT demonstrates high-attenuation, branching tubular filling defects within the pulmonary arteries of the left lower lobe and right upper lobe. These findings are diagnostic of acute pulmonary embolism presenting as hyperdense thrombi.
Key takeaways
On non-contrast chest CT, acute pulmonary emboli can sometimes be identified as high-attenuation (hyperdense) material within the pulmonary arterial lumen. This sign is highly specific for acute thrombus and can be an invaluable clue in patients scanned without intravenous contrast.
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