Question

1. Why do we want to remove low energy X-rays from the beam?

2. If you double the tube current what happens to the X-Ray output?

Answer 1

The xray is meant to be diagnostic by showing the difference between low-density tissues and high-density tissues (like bone).

If you deliver low-energy xray photons into the body, even the low-density tissues can attenuate it efficiently. That means it provides no discrimination between the two, but is able to damage tissue.

By removing the low energy photons, the ones that remain have a higher chance of moving completely through soft tissues. This can produce less damage and provides greater discrimination.

2. If we double the tube current , x ray output becomes boubled