In which scenarios should an x-ray machine be recalibrated?

Recalibrating an x-ray machine is crucial for ensuring consistent performance and image quality. The correct answer highlights the importance of recalibration following repairs or when quality control tests indicate issues. When repairs are made, there is potential for changes in the machine's components or operational effectiveness, which can affect the accuracy of the x-ray output. Additionally, if routine quality control tests reveal discrepancies or failures in the machine's performance, recalibration becomes essential to restore proper functioning.

Recalibration is not performed after every patient examination, as this would be impractical and unnecessary given that the machine can maintain consistent performance over a set period with adequate quality control checks. Similarly, while inspections are essential for overall safety and function, they do not trigger recalibration unless issues are discovered that warrant such action. Lastly, changes in the operator alone do not necessitate recalibration; however, it is vital for operators to be trained and knowledgeable about the machine's maintenance procedures and quality control requirements.