The document contains a radiographic technique chart listing various body parts and the recommended kilovoltage peak (kVp), milliampere-seconds (mAs), time, and source-image distance (SID) for imaging each part.
Changing the tube voltage and kVp can significantly influence the image quality. This is especially important for anyone handeling the parameters of the X-ray or CT-machine and an important information for radiology residents.
kVp is the factor that determines the energy of the x-ray photons produced because it determines the amount of kinetic energy each electron has as it moves from the filament to the anode. Kilovoltage is produced in the form of a wave over the time of the exposure. The “p” in kVp stands for peak.
Kilovoltage Peak (kVp) represents the maximum high voltage applied across the X-ray tube during exposure. This voltage accelerates electrons from the cathode toward the anode at high speeds. When these electrons strike the metal target, their energy is converted into X-ray photons.
Peak kilovoltage (kVp) refers to the maximum high voltage applied across an X-ray tube to produce the X-rays. During X-ray generation, surface electrons are released from a heated cathode by thermionic emission.
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kVp Influence on Beam Quality The first and most obvious technical factor that influences beam quality is the kVp (kiloVolt potential). This is a parameter which is easy to change on the system and a major control knob for the image quality in x-ray radiography and CT imaging.
To understand the difference between those two, you should first know that kilovolts (kV) and mAs are the two primary controls that we have with an X-Ray tube. They control the amount of radiation and the quality of the radiation beam or the X-ray beam.