What is the recommended thickness of an aluminum filter for x-rays with less than 70 kV?

The recommended thickness of an aluminum filter for x-rays with less than 70 kV is 1.5mm. The purpose of using an aluminum filter in radiographic imaging is to remove low-energy photons from the x-ray beam. These low-energy photons do not contribute to image formation, as they can be absorbed by tissue without contributing useful diagnostic information, ultimately increasing the patient's exposure to radiation.

Using 1.5mm of aluminum for x-rays with less than 70 kV aligns with established safety standards in radiography. It ensures that the beam is adequately filtered to enhance image quality while minimizing unnecessary radiation exposure to the patient. By balancing these factors, the 1.5mm thickness of the aluminum filter provides effective filtration for the range of kilovoltages specified. This consideration is essential in accordance with recommendations set forth by radiological safety guidelines and radiation protection agencies to maintain patient safety and imaging quality.