Target Volume Determination 2015

REGIONAL NODES

L4 : or supraclavicular L3 or infraclavicular: above pectoral muscles L2 : posterior to pectoralis minor L1 : caudally to pectoralis major IM Rotter : between pectoralis major and minor

With the arm raised, L1 lymph nodes may appear in the same CT slice as L2 and L3

A lymph node is typically a 5 mm margin around the veins