Chest CTA protocol selection #tweetorial for medical providers. Many clinicians don't know that pulmonary CTA is not adequate for aortic imaging & vice versa. Technologists time the studies very carefully to optimize enhancement of the appropriate vascular region. @CardiacRad 
2/Ideally, an order requests evaluation for 1 pathology - either pulmonary embolism OR acute aortic syndrome. Because the alternative vascular bed has no contrast in it on a well-timed, high quality study.
3/In patients with acute chest pain, we can perform "double rule out" or "triple rule out" & evaluate for PE, acute aortic syndrome &/or CAD. However, these studies deliver a higher radiation dose & do not optimize right or left heart, so level of enhancement is lower for both.
4/References:
Acute Aortic Pathologic pubs.rsna.org/doi/full/10.11…
Pulmonary CTA
pubmed.ncbi.nlm.nih.gov/27897042/
Acute Aortic Pathologic pubs.rsna.org/doi/full/10.11…
Pulmonary CTA
pubmed.ncbi.nlm.nih.gov/27897042/
For more CT protocol selection #tweetorials - read on!
https://twitter.com/PamelaJohnsonMD/status/1585582176371982339?s=20&t=MYBpDC6PrcuCShnQutaklw
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