LMRT ARRT Full Practice Exam 2025

X-ray equipment that operates at 70 kVp or higher is required to have a total filtration of at least 2.5 mm aluminum equivalent. This standard is set to ensure optimal patient safety and image quality by filtering out low-energy x-ray photons that do not contribute to diagnostic information. Low-energy photons are absorbed by the patient's body and increase radiation dose without providing any useful diagnostic benefit.

The requirement for 2.5 mm Al equivalent filtration is rooted in recommendations from various health and safety organizations, including the American College of Radiology (ACR) and the Radiological Society of North America (RSNA). Adequate filtration minimizes patient exposure while still allowing the necessary x-rays to penetrate through the patient for effective imaging.

Other choices indicate lesser filtration levels, which would not suffice for equipment operating at this energy range. Thus, 2.5 mm Al equivalent is crucial for achieving effective patient protection and ensuring compliance with safety regulations in radiographic practices.