Last Updated on January 21, 2023 by Mohamad Izwan

Anatomy of Temporal Bone

Image taken from The Skeletal


Examination Overview

Protocol Structure

00_Inner Ear (Adult)

    • Topogram
    • Non Contrast (vertex skull to the mid mandible)


  • Position the patient in head first supine position.
  • Align the patient in Mid-Sagittal plane of the table.
  • Position the transverse laser light beam at the vertex of skull to start the topogram.
  • Head rest must in flat.

Topogram Parameters

  • Topogram length: 256 mm
  • Slice: 0.6 mm
  • Scanning direction: Craniocoudal
  • Tube position: Lateral
  • Stop the topogram scanning when the scanning reach / pass over the mid of mandible

Non Contrast

  • Plan the Scan FOV (SFOV) box at topogram image
  • Set the top line at the level upper frontal sinus 
  • Set the bottom line at the level of lower maxillary sinus
  • Ensure the lateral line to cover patient’s head outline.

Scanning Parameters

  • kV: 120 kV
  • mAs: Tube Current Modulation (TCM)
  • Scanning Direction: Craniocaudal
  • Scan Delay: 2 s
  • Slice: 2.0mm
  • Image Comment: –
  • Pitch: 0.8
  • Quality Reference mAs : 230

Reconstruction of Non Contrast

Series of Images Send to PACS

  1. Topogram 0.6 T80f
  2. InnerEar 2.0 H60s
  3. InnerEar 0.6 H60s
  4. InnerEar 2.0 H30s
  5. InnerEar 0.6 H30s
  6. Patient Protocol