Question

All of the following will directly affect patient exposure except?

1. exposure time
2. 3 phase generator
4. target-to-panel distance
5. collimation

Answer 1

The factors that directly affect patient exposure to radiation except 3 phase generator (Option 2).

Step-by-step explanation:

The factors that directly affect patient exposure in radiographic imaging are:

• Exposure time: Less time means less exposure to radiation.
• Target-to-panel distance: Radiation intensity drops inversely proportional to the square of the distance from the radiation source.
• Collimation: This allows a portion of the rays to be selectively aimed at the target area, reducing exposure to surrounding tissues.

A 3-phase generator, while it can affect the quality of the X-ray image, does not directly affect the radiation dose the patient receives. Instead, it alters the voltage waveform supplied to the X-ray tube, influencing factors like beam quality and exposure time efficiency.

Thus, the correct option is number 2.