Practice Quiz

ADA NBDHE Dental Hygienist

Category - Provision of Clinical Dental Hygiene Services

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Which factor affects the contrast of a radiographic image?
  1. Milliamperage (mA)
  2. Kilovoltage peak (kVp)
  3. Distance
  4. Exposure time
Explanation
Answer: B - Kilovoltage peak (kVp) is the factor which affects the contrast of a radiographic image.
Density describes how much blackness is in a film, but contrast determines how sharply the dark and light areas are distinguished. The contrast factor is only affected by kVp. The higher the voltage the lower the contrast.
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