In an X-ray machine, what is the voltage related to?

In an X-ray machine, what is the voltage related to?

• A. The quantity of X-rays produced
• B. The penetrating capability of the x-rays
• C. The degree of resolution of the image
• D. The amount of time the x-rays are generated in the tube

Answer: (B)

Voltage across the X-ray tube sets how much energy the electrons have when they hit the target, and that energy becomes the energy of the X-ray photons produced. Higher voltage means higher-energy photons, which makes the X-rays more penetrating. So voltage is tied to the penetrating capability of the X-rays. The amount of X-rays produced (quantity) is mainly controlled by the tube current and exposure time, not the voltage, and image resolution depends more on focal spot size and the imaging geometry than on voltage.

Voltage across the X-ray tube sets how much energy the electrons have when they hit the target, and that energy becomes the energy of the X-ray photons produced. Higher voltage means higher-energy photons, which makes the X-rays more penetrating. So voltage is tied to the penetrating capability of the X-rays. The amount of X-rays produced (quantity) is mainly controlled by the tube current and exposure time, not the voltage, and image resolution depends more on focal spot size and the imaging geometry than on voltage.