Fig. 1
From: Classification of mastoid air cells by CT scan images using deep learning method
Various types of abnormal mastoids were presented. a Normal mastoid pneumatization on both right and left ear (class 1), b None pneumatization on both sides as yellow arrows indicate that there are no air cells (class 2), c Opacification in Complete pneumatization on the right mastoid which is shown by red arrows, left mastoid is normal, complete pneumatized, and there is no sclerosis on both sides (class 3), d Yellow arrows present none pneumatized parts of the mastoid on both side and the rest parts of the mastoid have opacified which is pointed by red arrows (class 4), e The right mastoid is partially pneumatized. The yellow arrow shows the sclerotic part of the right mastoid, while the left side is normal and completely pneumatized (class 5)