CT scan of normal temporal bone, photographed in bone window CT scan of normal temporal bone, photographed in bone window. Axial images (A) to (G) are inferior to superior. Legend for parts (H) to (K) appears on page 151. CT scan of normal temporal bone, photographed in bone window. Axial images (A) to (G) are inferior to superior. CT scan of normal temporal bone, photographed in bone window. Coronal images (H) to (K) are anterior to posterior. Abbreviations: AA, aditus ad antrum; CF, crista falciformis; CN7,ds, CN VII, descending mastoid segment; CN7,ls, CN VII, labyrinthine segment; CN7,ts, CN VII, tympanic segment; Co, cochlea; Co,at, cochlea, apical turn; Co,bt, cochlea, base turn; Co,mt, cochlea, middle turn; EAC, external auditory canal; ELS dep, endolymphatic sac depression; epi, epitympanum; FNR, facial nerve recess; GG, geniculate ganglion; GSPN, greater superficial petrosal nerve; hypo, hypotympanum; IAC, internal auditory canal; ICA, internal carotid artery; In, incus; ISA, incudostapedial articulation; Ma, malleus; meso, mesotympanum; Mo, modiolus; MIA, malleoincudal articulation; OW, oval window; PE, pyramidal eminence; PA, porus acusticus; *, Prussak space; RW, round window; Sc, scutum; SCC,l, semicircular canal, lateral; SCC,p, semicircular canal, posterior; SCC,s, semicircular canal, superior; St, stapes; ST, sinus tympani; TA, tympanic annulus; TM, tympanic membrane; TT, tegmen tympani; TTT, tensor tympani tendon; V, vestibule; VA, vestibular aqueduct. Source: Chapter 3. Radiology, CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e Citation: Lalwani AK. CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e; 2012 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/lalw3/lalw3_c003f140g.png&sec=39945253&BookID=386&ChapterSecID=39944034&imagename= Accessed: November 08, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved