How often should CR imaging plates be erased if not frequently in ...

[segrsyd]

How often should CR imaging plates be erased if not frequently in use?
 
 every hour
  every two hours
  every 24 hours
  every 12 hours

Question 2

Which positioning line connects the outer canthus to the external auditory meatus?
 
 acanthiomeatal line
  orbitomeatal line
  mentomeatal line
  infraorbitomeatal line

[TDubDCFL]

Answer to Question 1

every 24 hours

Rationale: Low energy x-rays from scatter and background radiation can cause background exposure that will degrade image quality. CR cassettes not in use should be erased every 24-48 hours before use.

Answer to Question 2

orbitomeatal line

Rationale: The line that connects the outer canthus of the orbit to the external auditory meatus is the orbitomeatal line. The line that connects the inferior orbital margin to the external auditory meatus is the infraorbitomeatal line.