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Understanding Temporal Bone, Sinuses & Ear Anatomy for Radiology Imaging

Dive into the detailed anatomy of the temporal bone, paranasal sinuses, and ear structures, essential for radiology imaging techniques. Learn about the intricate parts and connections, including ossicles, tympanic cavity, and sinuses, for accurate diagnostics.

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Understanding Temporal Bone, Sinuses & Ear Anatomy for Radiology Imaging

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  1. Chapter 11Part 5 Temporal Bone Paranasal Sinuses

  2. Petrous Pyramids • Dense portion on temporal bone • Houses • ___________ • ___________

  3. The Ear • 3 Portions • External • Middle • Inner

  4. External Ear • ____________ • Tragus • __________

  5. Middle Ear • 3 parts • ________________ • Tympanic __________ • _____________

  6. Tympanic Cavity • Contains ________________ • Epitympanic recess (Attic) • _______________ • Tympanic cavity proper • Larger • Inferior aspect • _________________ • Passage from middle ear to _______________ • Equalizes pressure

  7. Ossicle Articulations • _____________ • Attached to tympanic membrane • Receives vibrations and relates to • ______________ • Transmits vibrations from Malleus and passes on to • ____________ • Smallest • Transmits vibrations to oval window

  8. Internal Ear • Area of hearing and equilibrium • Contains 2 parts • __________________ • __________________ • Area within the osseous labyrinth

  9. Osseous Labyrinth • 3 parts • _____________ • For hearing • Round window • _____________ • Oval window • ____________________ • For equilibrium

  10. Internal Acoustic Meatus • Area of auditory and facial nerves • _______________best to visualize

  11. Mastoids • Inferior portion of ___________ • Mastoid air cells • Connects to middle ear from ________ by way of the __________ • Due to this direct connection infection can reach ________________

  12. Sinuses • ________________ • Lined with mucus membranes • Surrounding the nasal cavity • All _______________ with each other by way of nasal cavity

  13. Osteomeatal Complex • Area where __________is collected • Made of • __________- Nasal Conchae (Turbinates) • __________ – Spaces between conchae • From the osteomeatal complex to the nasal cavities

  14. Sinuses Con’t • Maxillary (2) • Frontal (usually 2) • Ethmoid (Many) • Sphenoid (1 or 2)

  15. Maxillary Sinus“Antrum of Highmore” • ________________ • Located in the body of maxillary bones • Lateral to Nasal cavity • Communicates to osteomeatal complex by way of _______________into middle nasal ____________ (Separated by uncinate process of ethmoid)

  16. Frontal Sinus • Located between ______________table of skull in frontal bone • Posterior to glabella • Can have 2 (most common) or 1 large sinus • _______________ • Communicate to osteomeatal complex by Ethmoid sinus through ______________

  17. Ethmoid Sinus • Located within the ethmoid bone _______________ • Many _____________ • Anterior, middle, posterior collections • Communicates with the osteomeatal complex directly by way of anterior collections and drains into ____________

  18. Sphenoid Sinus • Located in the body of the sphenoid bone • Inferior to __________ • Can have ____________ • Communicates to the osteomeatal complex by way of the _______________

  19. Imaging the sinuses Routine ________________________ • Waters (Parietoacanthial) • PA Caldwell • Right or Left Lateral • SMV • 40” SID • 70-80 kVp

  20. Waters • Tip of chin on IR Nose ½ to 1” off • ________________ perpendicular • OML forms 37° • Mid sagittal line perpendicular • CR to exit ___________________ • Open mouth can show • _________________

  21. PA Caldwell • PA Projection, Upright • __________________ • ______________and OML Perpendicular • Mid sagittal plane perpendicular • CR to exit ______________

  22. Lateral • Right or left site dependant of area of interest or department protocol. Upright • Place pt into anterior oblique • _____________perpendicular to IR • _______________to front of cassette • CR to enter between ____________________

  23. SMV • Upright • Tilt head back so ______________to IR • Mid sagittal perpendicular • CR to enter between _______________

  24. CT Invasion • Thin ________________ • Better visualization of ___________ complex

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