{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,1,13]],"date-time":"2024-01-13T00:19:58Z","timestamp":1705105198446},"reference-count":30,"publisher":"Oxford University Press (OUP)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Dentomaxillofacial Radiology"],"published-print":{"date-parts":[[2020,3]]},"abstract":"<jats:sec><jats:title>Objectives:<\/jats:title><jats:p> To assess presence and severity of image-stitching artefacts and distortion in lateral cephalograms acquired by CCD-based sensors and their association with movement. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods:<\/jats:title><jats:p> A human skull was mounted on a robot simulating five head movement types (anteroposterior translation\/lifting\/nodding\/lateral rotation\/tremor), at three distances (0.75\/1.5\/3\u2009mm), based on two patterns (skull returning\/not returning to the initial position, except for tremor). Three cephalometric units, two ProMax-2D (Planmeca Oy, Finland), one with Dimax-3 (D-3) and one with Dimax-4 (D-4) sensor, and one Orthophos-SL (ORT, Dentsply-Sirona, Germany), acquired cephalograms during the predetermined movements, in duplicate (54 with movement and 28 controls with no movement per unit). One observer assessed the presence of an image-stitching line (none\/thin\/thin with vertical stripes or thick), misalignment between the anatomical structure display (none\/&lt;1\/1\u20133\/&gt;3\u2009mm), and distortion in each image quadrant (present\/absent), in duplicate. Severe image-stitching artefacts were defined for images scored with a thin line with vertical stripes or thick line and\/or misalignment between anatomical structure display \u22651\u2009mm. Severe distortion was defined for images scored with distortion in both anterior quadrants of the skull. \u03ba-statistics provided intraobserver agreement. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results:<\/jats:title><jats:p> Intraobserver reproducibility was &gt;0.8 (all assessed parameters). Severe image-stitching artefacts were scored in 70.4 and 18.5% of D-3 and D-4 movement images, respectively. Severe distortion was scored in 64.8% of D-3, 5.6% of D-4 and 37% of ORT movement images. Neither severe image-stitching artefacts nor severe distortion were observed in control images. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion:<\/jats:title><jats:p> Sensor type, movement type, distance and pattern affected presence and severity of image-stitching artefacts and distortion in CCD-based cephalograms. <\/jats:p><\/jats:sec>","DOI":"10.1259\/dmfr.20190315","type":"journal-article","created":{"date-parts":[[2019,11,7]],"date-time":"2019-11-07T14:45:18Z","timestamp":1573137918000},"page":"20190315","source":"Crossref","is-referenced-by-count":2,"title":["Image-stitching artefacts and distortion in CCD-based cephalograms and their association with sensor type and head movement: <i>ex vivo<\/i> study"],"prefix":"10.1093","volume":"49","author":[{"given":"Olesya","family":"Svystun","sequence":"first","affiliation":[{"name":"Department of Dentistry and Oral Health, Oral Radiology, Aarhus University, Vennelyst Boulevard 9, 8000, Aarhus, 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