Quantitative evaluation of metal artifacts using different CBCT devices, high-density materials and field of views
Marina Codari, Karla de Faria Vasconcelos, Laura Ferreira Pinheiro Nicolielo, Francisco Haiter Neto, Reinhilde Jacobs
ARTIGO
Inglês
Agradecimentos: We are grateful to the São Paulo Research Foundation (FAPESP, Brazil) for the financial support (protocol # 2014/17744-5). In addition, we would like to thank the NEODENT Company (Curitiba, Paraná, Brazil) for providing the titanium cylinders for the present research (protocol #...
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Agradecimentos: We are grateful to the São Paulo Research Foundation (FAPESP, Brazil) for the financial support (protocol # 2014/17744-5). In addition, we would like to thank the NEODENT Company (Curitiba, Paraná, Brazil) for providing the titanium cylinders for the present research (protocol # 0309/14).
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Abstract: To objectively compare the influence of different cone-beam computed tomography (CBCT) devices, high-density materials and field of views (FOVs) on metal artifact expression. For this invitro study, three customized acrylic resin phantoms containing high-density materials cylinders:...
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Abstract: To objectively compare the influence of different cone-beam computed tomography (CBCT) devices, high-density materials and field of views (FOVs) on metal artifact expression. For this invitro study, three customized acrylic resin phantoms containing high-density materials cylinders: titanium, copper-aluminum alloy and amalgam were scanned on three CBCT devices using high-resolution protocols, same voxel size (0.2mm) and different FOVs. After fully automatic segmentation and image registration, the same region of interest was defined for the small and medium FOVs. The difference between the segmented and the real volume of the metal cylinders was assessed. Moreover for each segmented slice, the area difference between the segmented and the real axial section was determined. The artifacts on the background were measured as normalizing standard deviation of voxel values in the vicinity of the cylinder, in three different distances. Considerable differences were observed in volume measurements for all CBCTs devices and materials for both FOV sizes (up to 67%). The slice per slice area analysis indicated higher artifacts at the edges of the metal cylinder. Within the materials, amalgam and titanium had, respectively, the worst and best artifact expression in all the CBCT devices. Standard deviation values varied differently between the three distances in each device. Our invitro study showed that different CBCT devices, high-density materials and FOV should be considered while evaluating CBCT images. More carefully, diagnosis conclusions should be drawn in images containing amalgam and copper-aluminum alloy
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FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2014/17744-5
Fechado
Quantitative evaluation of metal artifacts using different CBCT devices, high-density materials and field of views
Marina Codari, Karla de Faria Vasconcelos, Laura Ferreira Pinheiro Nicolielo, Francisco Haiter Neto, Reinhilde Jacobs
Quantitative evaluation of metal artifacts using different CBCT devices, high-density materials and field of views
Marina Codari, Karla de Faria Vasconcelos, Laura Ferreira Pinheiro Nicolielo, Francisco Haiter Neto, Reinhilde Jacobs
Fontes
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Clinical oral implants research Vol. 28, no. 12 (Dec., 2017), p. 1509-1514 |