CAMRT Radiography Practice Exam

What is the acceptance criteria value for testing kVp accuracy in radiography?

1. ±5% of the selected value

2. ±10% of the selected value

3. ±15% of the selected value

4. ±20% of the selected value

The correct answer is: ±10% of the selected value

The acceptance criteria for testing kVp (kilovolt peak) accuracy in radiography is typically set at ±10% of the selected value. This means that when measuring the output of a radiographic unit, the actual kVp should fall within this range to ensure that the equipment is functioning properly and delivering the correct amount of radiation for imaging. Accurate kVp settings are crucial because they have a direct impact on the quality of the radiographic image and the dose of radiation received by the patient. If the kVp is too high or too low, it can lead to suboptimal image quality or unnecessary radiation exposure. The ±10% tolerance allows for a reasonable allowance in measurement variations while still maintaining safety and image quality standards. The other ranges that were mentioned would not be appropriate as acceptance criteria for kVp accuracy in a clinical setting. While larger tolerances like ±15% or ±20% might seem lenient, they could compromise image quality and patient safety, making them unsuitable for typical diagnostic radiography practices.