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Study data from Radboud University update understanding of oral and maxillofacial surgery
2009 AUG 25 - (NewsRx.com) -- "This study evaluated whether measurements on conventional frontal radiographs are comparable with measurements on cone beam computed C, tomography (CBCT)-constructed frontal cephalometric radiographs taken from dry human skulls. CBCT scans and conventional frontal cephalometric radiographs were made of 40 dry skulls," researchers in Netherlands report. "With I-Cat Vision® lot software, a cephalometric radiograph was constructed from the CBCT scan. Standard cephalometric software was used to identify landmarks and calculate ratios and angles. The same operator identified 10 landmarks on both types of cephalometric radiographs on all Images 5 times with a time-interval of I week. Intra-observer reliability was acceptable for all measurements. The reproducibility of the measurements on the frontal radiographs obtained from the CBCT scans was higher than those on conventional frontal radiographs. There is a statistically significant and clinically relevant difference between measurements on conventional and constructed frontal radiographs. There is a clinically relevant difference between angular measurements performed on conventional frontal cephalometric radiographs, compared with measurements on frontal cephalometric radiographs constructed from CBCT scans, owing to different positioning of patients in both devices," wrote O.J.C. Vanvlijmen and colleagues, Radboud University. The researchers concluded: "Positioning of the patient in the CBCT device appears to be an important factor in cases where a 2D projection of the 3D scan is made.." Vanvlijmen and colleagues published their study in International Journal of Oral and Maxillofacial Surgery (A comparison of frontal radiographs obtained from cone beam CT scans and conventional frontal radiographs of human skulls. International Journal of Oral and Maxillofacial Surgery, 2009;38(7):773-778). For additional information, contact O.J.C. Vanvlijmen, Radboud University, Medical Center, Dept. of Orthodontics & Oral Biology, POB 9101, NL-6500 HB Nijmegen, Netherlands. Publisher contact information for the International Journal of Oral and Maxillofacial Surgery is: Churchill Livingstone, Journal Production Dept., Robert Stevenson House, 1-3 Baxters Place, Leith Walk, Edinburgh EH1 3AF, Midlothian, Scotland. Keywords: Netherlands, Life Sciences, Maxillofacial Surgery, Orthodontics, Oral and Maxillofacial Surgery, Radboud University. This article was prepared by Medical Imaging Law Weekly editors from staff and other reports. Copyright 2009, Medical Imaging Law Weekly via NewsRx.com.
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