If the Original Exposure Factors Are 20 MAs @ 70

question 66

Multiple Choice

If the original exposure factors are 20 mAs @ 70 kVp,which of the following factors produce a film image with the same density but higher contrast?

• A)10 mAs @ 80 kVp.
• B)10 mAs @ 70 kVp.
• C)40 mAs @ 70 kVp.
• D)40 mAs @ 60 kVp.

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Definitions:

Absolute Threshold

The minimum intensity of a stimulus that one can detect 50 percent of the time, a concept fundamental in sensory and perception studies.

Difference Threshold

The minimum difference in stimulation that a person can detect 50 percent of the time.

Relative Magnitude

The comparison of the size, extent, or importance of something in relation to another.

Difference Threshold

The least variation in stimulation that an individual is able to recognize 50% of the occasions, commonly termed as the just noticeable difference (JND).