TOPIC: SKULL RADIOGRAPHY

🌟 IMPORTANT POINTS TO REMEMBER

🔹The cranium encloses and protects the brain and is made up of eight bones, two of which, the parietal and temporal, are paired.

🔹The technical requirements for extraoral imaging include a detector, a grid and equipment capable of a long source-to-film distance.

🔹Caudal difference: It is important to realise that there is an average caudal difference of approximately 7° to 10° between the OML and FH line.

🔹Detector used: The most common detectors used in extraoral radiography are film-based, however digital detectors, which can be either direct (charge couple device) or indirect.

🔹Size of cassette: The most common size of extraoral rigid cassette used in extraoral radiography is 8 × 10 in. (20.3 × 25.4 cm); however, 24 × 30 cm and 18 × 24 cm cassettes can be used.