A recent development in diagnosing total knee arthroplasty tibial component loosening uses Computed tomography (CT) images of loaded knees to assess implant micro-motion, but metal artefacts can affect reliability. This study investigates the impact of increased exposure and tube voltage, iterative metal artefact reduction reconstruction (iMAR), Sn-filtering and an extended CT scale (ECTS), compared to a standard knee CT protocol on load-induced implant displacement measurement.