What is the total filtration required for x-ray machines that operate above 70 KVP?

The total filtration required for x-ray machines that operate above 70 kVp is 2.5 mm of aluminum. This level of filtration is necessary to ensure that the x-ray beam is adequately filtered to reduce patient exposure to unnecessary radiation. Higher kVp settings penetrate tissues more effectively, but they also produce higher-energy x-rays that can result in increased scattering and potential exposure.

The purpose of filtration is to remove low-energy x-rays that do not contribute to image quality but can increase the dose of radiation to the patient. By specifying a minimum of 2.5 mm of aluminum as the standard filtration for machines operating above 70 kVp, regulatory bodies aim to optimize patient safety while still delivering the diagnostic capabilities needed for effective imaging. This standard helps ensure that the resulting x-ray beam is both effective for imaging and safe for patients, reducing the risk of radiation-related hazards.