Department of Oral Surgery and Stomatology and Oral Diagnostics, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
Information Technology (IT) Group, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
Clin Oral Investig. 2023 Sep;27(9):5627-5636. doi: 10.1007/s00784-023-05184-y. Epub 2023 Jul 31.
To retrospectively evaluate all cone-beam computed tomography (CBCT) scans acquired from 2017 to 2022 in a Swiss university dental clinic with particular emphasis on radiation protection aspects.
Radiological databases at the dental clinic of the University of Bern, Switzerland, were explored using a self-developed search algorithm. Data of all acquired CBCT from 01.01.2017 to 27.06.2022 were screened. Exposure parameters (exposure time, exposure angle, milliampere (mA), kilovoltage (kV), field of view (FOV) size), dose area product (DAP), age, and sex of the patient were recorded anonymously. The collected data were analyzed mainly descriptively. Correlations measured the statistical relationships between the variables.
A total of 10,348 CBCT datasets were analyzed. Patient age ranged from 5 to 96 years (mean: 49.4 years, SD: 21.6 years). The number of CBCTs in patients under 25 years was around 20% each year. In total, 10,313 (99.7%) CBCTs were acquired in small to medium FOV (FOV up to 10 cm of height), and 35 (0.3%) in large FOV (height > 10 cm). DAPs of small FOVs were 518.3 ± 233.2 mGycm (mean ± SD), of medium FOV 1233 ± 502.2 mGycm, and of large FOV 2189 ± 368.7 mGycm. DAP (ρ = 0.4048, p < 0.0001) and kV (ρ = 0.0210, p = 0.0327) correlated positively with age. Reduced scan angle correlated with young age (r 0.2729, p < 0.001). mA did not correlate with age (p = 0.3685).
This study demonstrates that certain well-known radiation protection aspects as the reduction of FOV, mA, kV, and scan angle were only partly considered.
Known radiation protection aspects, especially in young patients, should be fully applied in regular clinical practice.
回顾性评估 2017 年至 2022 年期间在瑞士一所大学牙科诊所拍摄的所有锥形束计算机断层扫描（CBCT），特别强调辐射防护方面。
使用自行开发的搜索算法，对瑞士伯尔尼大学牙科诊所的放射学数据库进行了研究。筛选了 2017 年 1 月 1 日至 2022 年 6 月 27 日期间获取的所有 CBCT 的数据。记录了患者的曝光参数（曝光时间、曝光角度、毫安（mA）、千伏（kV）、视野（FOV）大小）、剂量面积乘积（DAP）、年龄和性别。收集的数据主要采用描述性方法进行分析。相关性用于测量变量之间的统计关系。
共分析了 10348 个 CBCT 数据集。患者年龄为 5 至 96 岁（平均 49.4 岁，标准差 21.6 岁）。每年 25 岁以下患者的 CBCT 数量约占 20%。总共有 10313 个（99.7%）CBCT 采用小至中等 FOV（高度不超过 10 厘米的 FOV）采集，35 个（0.3%）采用大 FOV（高度超过 10 厘米）采集。小 FOV 的 DAP 为 518.3 ± 233.2 mGycm（均值 ± 标准差），中 FOV 为 1233 ± 502.2 mGycm，大 FOV 为 2189 ± 368.7 mGycm。DAP（ρ=0.4048，p<0.0001）和 kV（ρ=0.0210，p=0.0327）与年龄呈正相关。较小的扫描角度与年龄较小有关（r=0.2729，p<0.001）。mA 与年龄无相关性（p=0.3685）。
本研究表明，在一定程度上考虑了某些众所周知的辐射防护方面，如减少 FOV、mA、kV 和扫描角度。
在常规临床实践中，应充分应用已知的辐射防护方面，尤其是在年轻患者中。
