English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present the case of an 85-year-old man showing the “napkin-ring sign” tiered enhancement pattern on dual-phase coronary CT angiography using a 320-row multidetector CT. This has not been previously reported. In the first-phase scan, only the coronary arterial lumen was opacified. In the second-phase scan, not only the coronary arterial lumen but also the plaque margin was clearly enhanced (the “napkin-ring sign”). We considered that the tiered enhancement pattern might reflect the pathology of the “napkin-ring sign” which includes a necrotic core in the center of a plaque surrounded by fibrosis with proliferation of microangiotextures.

Napkin-Ring Sign on Coronary Computed Tomography Angiography-Tiered Enhancement of Coronary Lumen and Plaque