We appreciate your visit to Which of the following statements about dental radiographic exposure variables is true A Increasing the mA darkens the radiograph B Decreasing exposure time darkens the. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!
Answer :
Final answer:
Increasing the mA indeed darkens the radiograph because there are more X-ray photons produced, resulting in a darker image. Changing the exposure time adjustment is also not difficult on most machines. Also, though milliamperage does affect radiographic contrast, the contrast essentially depends on the kilovolt peak.
Explanation:
The statement, 'Increasing the mA darkens the radiograph.' is true about dental radiographic exposure variables. Milliamperage (mA) is a unit that measures the amount of electric current in the radiographic process. When the mA is increased, more X-ray photons are produced, resulting in a darker radiograph. It's worth noting, however, that this doesn't equate to a better quality image, as a too-dark image might lose details.
Also, milliamperage does affect the radiographic contrast, but it is not the primary factor. The contrast mainly depends on the kilovolt peak (kVp).
Decreasing the exposure time will not darken the radiograph. It's the opposite: reducing the duration of exposure time will lighten the radiograph because fewer X-ray photons are produced. Furthermore, exposure time adjustments are straightforward on most X-ray machines, contrary to the statement claiming that 'Exposure time is difficult to change on most machines'.
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