During a quality control test for accuracy of kVp, the result must be within what percentage of the control panel setting?

The correct choice for the acceptable percentage range for accuracy of kilovolt peak (kVp) during a quality control test is 10%. This standard is set to ensure that the x-ray machine's output closely matches what is indicated on the control panel; maintaining accuracy within this range is crucial for effective imaging and patient safety.

Specifically, the kVp setting directly influences the penetration power of the x-ray beam, which in turn affects image contrast and quality. If the output deviates significantly from the control panel setting, it can lead to suboptimal image quality or increased radiation dose to the patient, which is not acceptable in medical imaging practices.

Options outside of the 10% threshold could allow for larger discrepancies, potentially compromising diagnostic reliability, safety, and effectiveness of imaging procedures. Thus, a standard of 10% is generally upheld across various regulatory and professional guidelines in medical physics and radiology to ensure consistency and quality in x-ray imaging.