For how long must QA/QC written records be retained?

• A. 3 years
• B. 5 years
• C. 7 years
• D. 10 years

Answer: (C)

QA/QC documentation is kept for a length of time that lets you see how equipment performs over multiple years and supports regulatory or accreditation reviews. These records show acceptance tests, calibration, performance checks, and any corrective actions, which helps you spot drift or recurring issues before they affect patient safety. Keeping them for seven years gives a sufficient window to analyze long‑term trends, comply with radiation safety program requirements, and be ready for audits or investigations that may arise well after the tests were done. Shorter periods might miss gradual changes, and ten years tends to be more than necessary for routine QA/QC data. Seven years strikes the right balance, which is why it’s the correct retention period.