Rubens Spin-Neto

Image-Stitching Artefacts in CCD-Based Cephalograms and Their Association with Head Movement. An Ex Vivo Study

Publikation: KonferencebidragKonferenceabstrakt til konferenceForskningpeer review

AimTo assess the presence and severity of image-stitching artefacts (i.e. stitching lines) in cephalograms acquired usingCCD-based image sensors, and their association with head movement. Image-stitching artefacts may occur whenimage segments from separate sensors are blended to compose a single cephalogram.Material and MethodsA human skull was mounted on a robot simulating five head movements (antero-posterior translation/lifting/nodding/lateral rotation/tremor), at three distances (0.75/1.5/3 mm). Two ProMax-2D units, with a Dimax-3 (D-3) or Dimax-4(D-4) sensor, acquired skull cephalograms (exposure time 17 seconds) during the predetermined movements (54images/unit) and no-motion (28 images/unit). A trained observer assessed the presence of image-stitching artefacts,misalignment between the anatomical structure display on each side of the stitching line, and if the image-stitchingartefact interfered with orthodontic landmarks.ResultsImage-stitching artefacts were visible in 28 (D-3, 100%) and 2 (D-4, 7%) no-motion images. For D-3, there was amisalignment of anatomical structures over the stitching line in 39% of the no-motion images. Regarding examinationswith movement, 53 (D-3, 98%) and 14 (D-4, 26%) images presented image-stitching artefacts. For D-3, artefacts wereassociated with a misalignment of anatomical structures in 87% of the cases (>3 mm in 43%). For D-4, misalignment ofanatomical structures was present in 22% of the cases (>3 mm in 15%), and were mostly caused by large (3 mm) headmovements. Image-stitching artefacts did not interfere with orthodontic landmarks.ConclusionThe image sensor and head movements have an effect on the presence and severity of image-stitching artefacts inCCD-based cephalograms.
Antal sider1
StatusUdgivet - 2018
BegivenhedEuropean Congress of DentoMaxilloFacial Radiology 2018 - The Swiss Museum of Transport in Lucerne, Lucerne, Schweiz
Varighed: 14 jun. 201816 jun. 2018


KonferenceEuropean Congress of DentoMaxilloFacial Radiology 2018
LokationThe Swiss Museum of Transport in Lucerne

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