NORMAL CXR ANSWERS

purple-major fissures, dividing LUL from LLL and RUL from RLL (upper portion) and RML from RLL (lower portion)

light blue-minor fissure, dividing RUL from RML

red-RML abuts the right heart margin

dk blue-LUL (lingula) abuts left heart margin

green-RLL abuts right diaphragm margin

yellow-LLL abuts left diaphragm margin