Department of Thoracic Imaging, hôpital Calmette, université Lille Nord de France, boulevard Jules-Leclercq, Lille cedex, France.
Diagn Interv Imaging. 2012 Nov;93(11):852-8. doi: 10.1016/j.diii.2012.07.009. Epub 2012 Oct 1.
To establish the radiation dose level for single- and dual-source thoracic CT scans in daily practice.
The dose levels delivered during 634 consecutive examinations over a period of 2 months were recorded. The CT scans were performed using: (a) a standard protocol (single source, single energy [group 1]: n=266; dual source, single energy [group 2]: n=276; (b) with prospective ECG synchronisation [group 3]: n=13; or (c) with dual energy [group 4]: n=79. All the acquisitions included kilovoltage selection depending on the weight and automatic milliamperage modulation.
The mean DLP of the standard protocols was 97.12 mGycm (group 2; BMI=23.1kg/m(2)) and 211.1 mGycm (group 1; BMI=27.3kg/m(2)), the choice of protocol depending on the diameter of the thorax relative to the diameter of the field of the second source, and therefore on the patient's morphotype. When imaging included examination of the proximal and middle coronary arteries (group 3), the mean DLP was 105.5 mGycm. Morphological and functional imaging (group 4) was obtained with a mean DLP of 404.3 mGycm.
Depending on the objective of the protocol, the mean DLP varied from 97.12 to 404.3 mGycm.
确定日常实践中单源和双源胸部 CT 扫描的辐射剂量水平。
记录了在两个月的时间内进行的 634 次连续检查的剂量水平。CT 扫描采用：（a）标准方案（单源，单能量[组 1]：n=266；双源，单能量[组 2]：n=276；（b）前瞻性 ECG 同步[组 3]：n=13；或（c）双能量[组 4]：n=79。所有采集都包括根据体重和自动毫安调制选择千伏。
标准方案的平均 DLP 为 97.12 mGycm（组 2；BMI=23.1kg/m²）和 211.1 mGycm（组 1；BMI=27.3kg/m²），方案的选择取决于与第二源的场直径相对的胸部直径，因此取决于患者的体型。当包括近端和中段冠状动脉检查（组 3）时，平均 DLP 为 105.5 mGycm。形态学和功能成像（组 4）的平均 DLP 为 404.3 mGycm。
根据方案的目的，平均 DLP 从 97.12 到 404.3 mGycm 不等。
