Use of fast screen allows:
- A- Reduction of kv.
- B- Reduction of mA.
- C- Reduction of exposure time.
- D- Use of fine focus.
- E- Any of above.
The correct answer is C- Reduction of exposure time.
Here's why:
- Fast screen:
This term can refer to a high-resolution screen or a screen with a fast refresh rate. Both types of screens can allow for faster image capture, which translates to shorter exposure times.
- Reduction of kv:
Kv (kilovolts) is the unit of measurement for the potential difference across an X-ray tube. Reducing kv decreases the intensity of the X-ray beam, which can require a longer exposure time to achieve the desired image brightness. This contradicts the benefit of a fast screen.
- Reduction of mA:
mA (milliamperes) is the unit of measurement for the current flowing through the X-ray tube. Reducing mA decreases the amount of X-rays produced, which also requires a longer exposure time. Similar to kv, this contradicts the benefit of a fast screen.
- Use of fine focus:
Fine focus refers to a setting on the X-ray machine that produces a sharper image. This setting can be used with any type of screen and doesn't necessarily affect exposure time.
- Any of above:
This is not the most accurate answer as only reduction of exposure time directly benefits from a fast screen.
Therefore, the only option that directly aligns with the benefit of a fast screen is reduction of exposure time.
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