Effective dose of cone beam CT (CBCT) of the facial skeleton: a systematic review

被引:44
|
作者
Al-Okshi, A. [1 ]
Lindh, C. [1 ]
Sale, H. [1 ]
Gunnarsson, M. [2 ]
Rohlin, M. [1 ]
机构
[1] Malmo Univ, Fac Odontol, Dept Oral & Maxillofacial Radiol, Malmo, Sweden
[2] Skane Univ Hosp, Med Radiat Phys, Malmo, Sweden
来源
BRITISH JOURNAL OF RADIOLOGY | 2015年 / 88卷 / 1045期
关键词
MULTISLICE COMPUTED-TOMOGRAPHY; IMAGE QUALITY; COMPARATIVE DOSIMETRY; DIFFERENT FIELDS; 3D ACCUITOMO; DEVICES; REDUCTION; SCANNERS; MSCT;
D O I
10.1259/bjr.20140658
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Objective: To estimate effective dose of cone beam CT (CBCT) of the facial skeleton with focus on measurement methods and scanning protocols. Methods: A systematic review, which adhered to the preferred reporting items for systematic reviews (PRISMA) Statement, of the literature up to April 2014 was conducted. Data sources included MEDLINE (R), The Cochrane Library and Web of Science. A model was developed to underpin data extraction from 38 included studies. Results: Technical specifications of the CBCT units were insufficiently described. Heterogeneity in measurement methods and scanning protocols between studies made comparisons of effective doses of different CBCT units and scanning protocols difficult. Few studies related doses to image quality. Reported effective dose varied across studies, ranging between 9.7 and 197.0 mu Sv for field of views (FOVs) with height <= 5 cm, between 3.9 and 674.0 mu Sv for FOVs of heights 5.1-10.0 cm and between 8.8 and 1073.0 mu Sv for FOVs >10 cm. There was an inconsistency regarding reported effective dose of studies of the same CBCT unit with the same FOV dimensions. Conclusion: The review reveals a need for studies on radiation dosages related to image quality. Reporting quality of future studies has to be improved to facilitate comparison of effective doses obtained from examinations with different CBCT units and scanning protocols. A model with minimum data set on important parameters based on this observation is proposed. Advances in knowledge: Data important when estimating effective dose were insufficiently reported in most studies. A model with minimum data based on this observation is proposed. Few studies related effective dose to image quality.
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页数:14
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