Radiology Flashcards
The rectangular PID is the most effective in….
reducing patient exposure
What restricts the size and shape of the X-ray beam?
Collimator
What is a collimator made of?
lead
The dose of radiation that the body can endure with little or no chance in injury is….
Maximum permissible dose
what does anatomical landmarks on maxillary central incisors include
incisive foremen, nasal fossa, and maxillary sinus
what are multiple images on a film caused by?
double exposure
What is taken to obtain diagnostic information?
Dental S-rays
What does the amount of radiation exposure and individual receives depend on?
Film speed, collimation, technique, and exposure factors
What size films are used to expose posterior periapical and adult bitewing projections?
Size 2 films
Who is the only person that should be in the path of the useful beam?
The patient
What does the paralleling technique produce?
An image without distortion and magnification
What are the set up sets to follow in exposing?
- place film
- set vertical angulation
- set horizontal angulation
- center PID (cone) over the film
Radiographs that show a half-moon shaped area of unexposed film is the result of what?
result of the cone being centered over the teeth
what is the ultimate goal of a good radiographic technique?
To limit the amount of radiation the patient receives
What is a dark film caused by?
Over developing and developer solution too hot
Anterior films are placed?
vertically
Posterior films are placed?
Horizontally
What is the result of an image that is foreshortened?
Too much vertical angulation results in