Automated Motion Artefact Correction and the Impact on Cone Beam Computed Tomography Image Quality and Interpretability. An Ex Vivo Study

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AimTo assess the impact of head motion artefacts and an automated artefact-correction system on CBCT image quality andinterpretability for simulated diagnostic tasks.Material and MethodsA partially dentate human skull was mounted on a robot simulating four types of head movement (antero-posteriortranslation/APT, nodding/NOD, lateral rotation/ROT, and tremor/TRM), at three distances (0.75, 1.5, and 3 mm) basedon two movement patterns (skull returning/not returning to the initial position). Two diagnostic tasks were simulated:dental implant planning/IP, and detection of a periapical lesion/AP. Three CBCT units were used to examine the skullduring the movements and no-motion (control): Cranex 3Dx/CRA, Orthophos SL 3D/ORT, and the X1 without (X1wo)and with (X1wi) an automated motion artefact-correction system. Eighty-eight examinations were performed for eachdiagnostic task. Three observers, blinded to unit and movement, scored image quality: presence of stripe artefacts(present/absent), overall unsharpness (present/absent), and image interpretability (interpretable/non-interpretable).Kappa statistics assessed interobserver agreement, and descriptive statistics summarized the findings.ResultsInterobserver agreement for image interpretability was good (average kappa=0.68). Regarding IP, X1wi images wereinterpretable by all observers, while for the other units mainly the cases with TRM were non-interpretable. RegardingAP, besides TRM, some cases with APT, NOD, and ROT at 3 mm distance and the “not returning” pattern were also noninterpretablefor CRA, ORT, and X1wo. For X1wi, two observers scored 1.5 mm TRM and one observer scored 3 mm TRMas non-interpretable.ConclusionThe automated motion artefact-correction system significantly enhanced CBCT image quality and interpretability.
Antal sider1
StatusUdgivet - 2018
BegivenhedEuropean Congress of DentoMaxilloFacial Radiology 2018 - Verkehrshaus (Swiss Museum of Transport), Luzern, Schweiz
Varighed: 13 jun. 201816 jun. 2018
Konferencens nummer: XVI


KonferenceEuropean Congress of DentoMaxilloFacial Radiology 2018
LokationVerkehrshaus (Swiss Museum of Transport)

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