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학술저널
저자정보
Queiroz, Polyane Mazucatto (Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas) Santaella, Gustavo Machado (Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas) Groppo, Francisco Carlos (Department of Physiological Sciences, Area of Pharmacology, Piracicaba Dental School, University of Campinas) Freitas, Deborah Queiroz (Department of Oral Diagnosis, Area of Oral Radiology, Piracicaba Dental School, University of Campinas)
저널정보
대한영상치의학회 Imaging science in dentistry Imaging science in dentistry 제48권 제1호
발행연도
2018.1
수록면
41 - 44 (4page)

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Purpose: To evaluate the effect of different numbers of basis images and the use of metal artifact reduction (MAR) on the production and reduction of artifacts in cone-beam computed tomography images. Materials and Methods: An acrylic resin phantom with a metal alloy sample was scanned, with 450 or 720 basis images and with or without MAR. Standard deviation values for the test areas (around the metal object) were obtained as a way of measuring artifact production. Two-way analysis of variance was used with a 5% significance level. Results: There was no significant difference in artifact production among the images obtained with different numbers of basis images without MAR (P=.985). MAR significantly reduced artifact production in the test areas only in the protocol using 720 basis images (P=.017). The protocol using 450 basis images with MAR showed no significant difference in artifact production when compared to the protocol using 720 basis images with MAR (P=.579). Conclusion: Protocols with a smaller number of basis images and with MAR activated are preferable for minimizing artifact production in tomographic images without exposing the patient to a greater radiation dose.

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