The half value thickness is the thickness required to reduce the intensity of a beam of radiation to half of its initial value, A thickness of 2 HVT will reduce the intensity to a quarter, 3 HVT reduces it to an eighth, and so on,
Un espesor de 2 HVL reducirá la intensidad a un cuarto, 3 HVL la reducirá a un octavo y así sucesivamente.