Oral and Maxillofacial Radiology, Applied Oral Sciences & Community Dental Care, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, China.
Radiology and Imaging Science, Department of Diagnosis and Oral Health, University of Louisville School of Dentistry, Louisville, KY, USA.
Clin Oral Investig. 2020 Dec;24(12):4501-4510. doi: 10.1007/s00784-020-03315-3. Epub 2020 Jun 2.
To investigate the frequency and reasons for retaking cone beam computed tomography (CBCT) scans in an oral and maxillofacial radiology imaging clinic in a dental institution.
A retrospective cohort chart audit of the patient image database was performed for 1737 patients attending the Diagnostic Imaging clinic at the Prince Philip Dental Hospital from February 2016 to May 2019, and the rate of, and reasons for, CBCT image re-exposure was tallied. Patient demographics (age and gender) and CBCT acquisition parameters (CBCT unit, field-of-view (FOV), scanned region of interest, and exposure time) were recorded and correlated to retake analysis.
The retake rate was 4.6% (80/1737). The most common reasons for re-exposure were incomplete FOV coverage (57.5%) and motion artifacts (27.5%). Patients under 12 years of age had a significantly higher risk for motion artifacts. CBCT for the temporomandibular joint (TMJ) had a significantly higher risk for incomplete FOV coverage.
Children (less than 12 years of age) demonstrate a higher frequency of retakes, principally due to motion artifacts. TMJ CBCT examinations have a higher frequency of retakes due to an incomplete FOV coverage.
Information regarding the frequency and reasons for CBCT retakes is beneficial to identify procedures, practices, or patients susceptible to additional radiation exposure and implement appropriate and specific quality control protocols.
调查在牙科机构的口腔颌面放射学成像诊所中，重复锥形束计算机断层扫描（CBCT）的频率和原因。
对 2016 年 2 月至 2019 年 5 月期间在菲利普亲王牙科医院诊断成像诊所就诊的 1737 名患者的患者图像数据库进行了回顾性队列图表审核，并统计了 CBCT 图像重拍的比率和原因。记录了患者人口统计学特征（年龄和性别）和 CBCT 采集参数（CBCT 单位、视野（FOV）、扫描感兴趣区域和曝光时间），并与重拍分析相关联。
重拍率为 4.6%（80/1737）。重新曝光的最常见原因是 FOV 覆盖不完整（57.5%）和运动伪影（27.5%）。12 岁以下的患者运动伪影的风险明显更高。颞下颌关节（TMJ）的 CBCT 有更高的 FOV 覆盖不完整的风险。
儿童（12 岁以下）的重拍频率更高，主要是由于运动伪影。TMJ CBCT 检查的重拍频率更高，原因是 FOV 覆盖不完整。
了解 CBCT 重拍的频率和原因有助于识别可能需要额外辐射暴露的程序、实践或患者，并实施适当和具体的质量控制协议。
