CTICasesHyperdense pulmonary embolus on non-contrast CT
Imaging findings
Non-contrast CT scan of a 51-year-old kidney transplant recipient shows hyperdense material (30-40 HU above blood pool) in the right lower lobe pulmonary artery branches. Follow-up CTA confirmed large bilateral acute pulmonary emboli.
Key takeaways
Acute pulmonary emboli can sometimes be identified on non-contrast CT as hyperdense material within the pulmonary arteries. Recognizing this finding can be critical in patients with renal failure where contrast is contraindicated.
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