When the selected tube voltage is 80 kilovoltage peak (kVp), the actual kVp must be accurate within a range of which of the following?

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Prepare for the Clover Learning Radiography Image Evaluation and Quality Control Test with targeted quizzes and explanations. Master the skills needed to succeed in radiography and ensure quality control with our dynamic study materials.

Multiple Choice

When the selected tube voltage is 80 kilovoltage peak (kVp), the actual kVp must be accurate within a range of which of the following?

Explanation:
Maintaining accurate tube voltage is essential because kVp influences image contrast and penetration. QC standards set a tolerance for how far the actual kVp can deviate from the indicated value. This tolerance is typically about ±5% of the indicated kVp. For 80 kVp, ±5% equals ±4 kVp, so the acceptable range is 76–84 kVp. The other options are either too strict or too lenient compared with standard acceptance criteria. Therefore, the proper tolerance is ±4.0 kVp.

Maintaining accurate tube voltage is essential because kVp influences image contrast and penetration. QC standards set a tolerance for how far the actual kVp can deviate from the indicated value. This tolerance is typically about ±5% of the indicated kVp. For 80 kVp, ±5% equals ±4 kVp, so the acceptable range is 76–84 kVp. The other options are either too strict or too lenient compared with standard acceptance criteria. Therefore, the proper tolerance is ±4.0 kVp.

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