Radiography Flashcards
What does a rectangular collimator do?
Reduces patient dose up to 50%
When were x rays discovered?
1895
How many mSv are in 2 bite wings?
0.002 mSv
What year did the ionising radiation regulation act come into place?
1999
What of the annual dose of mSv?
6msv
What year did IRMER come into force?
2000
What is an RPA
Radiation protection advisor
Expert able to give advice on protection
What is an RPS
Radiation protection supervisor
Someone within the practice
Ensure compliance with local rules
How often is the X-ray equipment maintained?
Every 3 years
What is a lateral oblique xray
Half of the face/jaw
What are the three basic components of a film?
Base
Emulsion
Super coat
Components of x ray packet?
Waterproof jacket Black paper Film Black paper Lead foil Waterproof jacket
What is developer?
Alkaline
What is fixer?
Acidic
How should films be stored?
Upright
What is grade 1?
Excellent
What is grade 2?
Diagnostically unacceptable, but still able to use
What is grade 3?
Unacceptable need to retake
What is a black line on the radiograph caused by?
Poor handling
What is the yellowish/brown discloured fault?
Insufficient rinsing/exhausted solution
What is the result of a fogged film?
Light exposure
How is a double image caused?
Re exposure
What is the purpose of an intensifying screen?
Reduces x ray dose to the patient