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논문 기본 정보

자료유형
학술저널
저자정보
Park, Ha-Na (Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonbuk National University) Min, Chang-Ki (Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonbuk National University) Kim, Kyoung-A (Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonbuk National University) Koh, Kwang-Joon (Department of Oral and Maxillofacial Radiology, School of Dentistry, Chonbuk National University)
저널정보
대한영상치의학회 Imaging science in dentistry Imaging science in dentistry 제49권 제2호
발행연도
2019.1
수록면
139 - 151 (13page)

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Purpose: This study was performed to investigate the effect of exposure parameters on image quality obtained using a cone-beam computed tomography (CBCT) scanner and the relationship between physical factors and clinical image quality depending on the diagnostic task. Materials and Methods: CBCT images of a SedentexCT IQ phantom and a real skull phantom were obtained under different combinations of tube voltage and tube current (Alphard 3030 CBCT scanner, 78-90 kVp and 2-8 mA). The images obtained using a SedentexCT IQ phantom were analyzed technically, and the physical factors of image noise, contrast resolution, spatial resolution, and metal artifacts were measured. The images obtained using a real skull phantom were evaluated for each diagnostic task by 6 oral and maxillofacial radiologists, and each setting was classified as acceptable or unacceptable based on those evaluations. A statistical analysis of the relationships of exposure parameters and physical factors with observer scores was conducted. Results: For periapical diagnosis and implant planning, the tube current of the acceptable images was significantly higher than that of the unacceptable images. Image noise, the contrast-to-noise ratio (CNR), the line pair chart on the Z axis, and modulation transfer function (MTF) values showed statistically significant differences between the acceptable and unacceptable image groups. The cut-off values obtained using receiver operating characteristic curves for CNR and MTF 10 were useful for determining acceptability. Conclusion: Tube current had a major influence on clinical image quality. CNR and MTF 10 were useful physical factors that showed significantly associations with clinical image quality.
#Optimization #Image Quality #Cone-Beam Computed Tomography

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참고문헌 (35)

참고문헌 신청
Bamba J / 2013 / Image quality assessment of three cone beam CT machines using the SEDENTEXCT CT phantom / Dentomaxillofac Radiol 42:20120445 google schola Scarfe WC / 2006 / Clinical applications of cone-beam computed tomography in dental practice / J Can Dent Assoc 72:75~80 google schola Ludlow JB / 2008 / Patient risk related to common dental radiographic examinations: the impact of 2007 International Commission on Radiological Protection recommendations regarding dose calculation / J Am Dent Assoc 139:1237~1243 google schola Al-Okshi A / 2017 / Dose optimization for assessment of periodontal structures in cone beam CT examinations / Dentomaxillofac Radiol 46:20160311 google schola Cohnen M / 2002 / Radiation dose in dental radiology / Eur Radiol 12:634~637 google schola

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