Vano E, Fernandez J M, Ten J I, Gonzalez L, Guibelalde E, Prieto C
Medical Physics Service, San Carlos University Hospital, 28040 Madrid, Spain.
Radiat Prot Dosimetry. 2005;117(1-3):199-203. doi: 10.1093/rpd/nci716. Epub 2006 Feb 3.
The present work describes an online patient dosimetry and an image quality system in digital radiology. For the patient dosimetry audit, current mean values of entrance surface dose (ESD) were compared with local and national reference values (RVs) for the specific examination type evaluated. Mean values exceeding the RV trigger an alarm signal and then an evaluation of the technical parameters, operational practice and image quality was begun, using data available in the DICOM header to derive any abnormal settings or performance to obtain the image. The X-ray tube output for different kVp values is measured periodically, to allow for the automatic calculation of ESD. The system allows also for image audit, linking the dose imparted, the image quality and the alarm condition, if produced. Results and the benefits derived from this online quality control are discussed here.
本研究描述了数字放射学中的在线患者剂量测定和图像质量系统。对于患者剂量测定审核，将当前的入射表面剂量（ESD）平均值与所评估的特定检查类型的本地和国家参考值（RVs）进行比较。超过参考值的平均值会触发警报信号，然后开始使用DICOM头文件中的可用数据对技术参数、操作实践和图像质量进行评估，以得出任何异常设置或获取图像的性能情况。定期测量不同千伏峰值（kVp）值下的X射线管输出，以便自动计算ESD。该系统还允许进行图像审核，将所施加的剂量、图像质量和警报情况（如果产生）联系起来。本文讨论了该在线质量控制的结果和益处。
