Kerley B line
Ker·ley B line(kûr′lē)
Any of several fine horizontal lines a few centimeters above the angle in the chest x-ray that is made by the recess between the ribs and the lateral-most portion of the diaphragm.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.