Fig. 12
From: Developing a production workflow for 3D-printed temporal bone surgical simulators
a CAD modelling and (b) 3D rendering of the round window membranous opening depicted with an X-shaped structure, which although non-anatomical serves to delineate its location perpendicular to the opening of the oval window and both crus of the stapes. This is not well visualised on CT due to its thin diameter and low density