Signet ring sign – a CT feature of bronchiectasis. As a general…

Signet ring sign – a CT feature of bronchiectasis. As a general rule a bronchus should be no larger than its accompanying pulmonary artery, and if a bronchus is more than 50% larger then this is diagnostic of bronchiectasis. When a dilated bronchiectatic bronchus is viewed in cross-section next to its smaller accompanying pulmonary artery this simulates the appearance of a signet ring, a type of ring once worn by nobles who used them to apply wax seals to their correspondences. 

from our tumblr blog: http://radiologysigns.tumblr.com/post/25330514278

http://radiologysigns.tumblr.com/

Advertisements

Tags: , , , , , ,

About Radiopaedia.org

Official Wordpress feed for Radiopaedia.org, a free online collaborative radiology resource.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: