Chapter 8: Dental X-ray Characteristics Flashcards
The portion of a dental image that appears dark or black is termed ________
Radiolucent
The portion of a dental image that appears light or white is termed ______
Radiopaque
What appears more radiolucent on a dental image? A. Bone B. Enamel C. Dentin D. Air space
D. Air space
What appears most radiopaque on a dental image? A. Bone B. Enamel C. Dentin D. All of the above
D. All of the above
The overall blackness or darkness of a dental image is termed:
Density
Increasing the milliamperage (mA) will cause:
An increase in density; the image appears darker
Increasing the operating kilovoltage (kV) will cause:
An increase in density; the image appears darker
A dental patient has thick soft tissues and dense bones. To compensate for this increase in subject thickness and to provide an image of diagnostic density, the dental radiographer may:
- increase the exposure time
- increase mA
- increase the kV
The difference in the degrees of densities between adjacent areas on a dental image is termed:
Contrast
A dental image that demonstrates many shades of gray is said to have:
Low contrast
A dental image that demonstrates very dark areas and very light areas is said to have:
High contrast
The one exposure factor that has a direct influence on the contrast of a dental image is:
Kilovoltage
The type of contrast preferred in dental imaging is:
A compromise between short-scale contrast and long-scale contrast
What all is the stepwedge used for:
- to demonstrate short scale and long scale contrast
- to monitor quality control of film processing
- to demonstrate densities
The capability of the receptor to reproduce distinct outlines of an object is termed:
Sharpness
