If we decrease the voltage, then we will see a decrease in the energy of X-Rays and the X-Rays become less penetrating. They impact the anode at a higher and higher energy and create higher energy X-Rays. In conclusion, t he voltage difference between the cathode and the anode is kVp.Īs we increase the kVp or the voltage difference, we increase the speed at which the electrons traverse the chamber. With higher energy of those, we end up with more penetrating power or the ability for the X-Rays to penetrate thicker and more dense body parts. If we have higher and higher energy electrons hitting the anode, the resultant X-Rays will also be higher energy. Nationwide Evaluation of X-Ray Trends (NEXT). So that’s the voltage you’re seeing in the image above. One manufacturer states that their E-F-speed film is an F-speed film when. The velocity that the electrons accelerate across the gap of the chamber will be higher and higher as we increase the voltage of the tube. The electrons will traverse the gap at a much higher rate. The bigger the voltage difference is or the stronger positive charge that we have on the anode, the stronger negative charge that we have on the cathode. This is where we create a potential difference. There was no significant difference in any of the radiographic states. This is a voltage difference between the cathode or the filament and the anode.

To understand how kVp is produced you should first know that within the X-Ray tube we can apply a potential difference.

Diff bet x ray film speed