Within the medical field of otology, the<unk>  is a radiological technique named after the physician Hendrik Willem<unk>  (1889–1973) of Utrecht. It provides an oblique view of the skull and establishes a better perspective on the petrous bone, bony labyrinth, and internal auditory canal. It focuses on the posteroanterior and lateral planes.
Stenvers projection
Kerley lines
Loop mark
Tram track 
Pocock boundary
Cramp-ring
Hippocratic bench
Cradle cap