Department of Radiology, Massachusetts General Hospital, Boston, MA 02114, USA.
J Thorac Imaging. 2012 May;27(3):148-51. doi: 10.1097/RTI.0b013e3182455f36.
To determine the repeat rate (RR) of chest radiographs acquired with portable computed radiography (CR) and installed direct radiography (DR) and to develop and assess strategies designed to decrease the RR.
The RR and reasons for repeated digital chest radiographs were documented over the course of 16 months while a task force of thoracic radiologists, technologist supervisors, technologists, and information technology specialists continued to examine the workflow for underlying causes. Interventions decreasing the RR were designed and implemented.
The initial RR of digital chest radiographs was 3.6% (138/3818) for portable CR and 13.3% (476/3575) for installed DR systems. By combining RR measurement with workflow analysis, targets for technical and teaching interventions were identified. The interventions decreased the RR to 1.8% (81/4476) for portable CR and to 8.2% (306/3748) for installed DR.
We found the RR of direct digital chest radiography to be significantly higher than that of computed chest radiography. We believe this is due to the ease with which repeat images can be obtained and discarded, and it suggests the need for ongoing surveillance of RR. We were able to demonstrate that strategies to lower the RR, which had been developed in the era of film-based imaging, can be adapted to the digital environment. On the basis of our findings, we encourage radiologists to assess their own departmental RRs for direct digital chest radiography and to consider similar interventions if necessary to achieve acceptable RRs for this modality.
确定便携式计算机射线摄影（CR）和安装直接射线摄影（DR）获得的胸部射线照片的重复率（RR），并制定和评估旨在降低 RR 的策略。
在 16 个月的时间里，记录了数字胸部射线照片的 RR 以及重复拍摄的原因，同时胸放射科医生、技术主管、技术员和信息技术专家组成的工作组继续检查潜在原因的工作流程。设计并实施了降低 RR 的干预措施。
便携式 CR 的初始数字胸部射线照片 RR 为 3.6%（138/3818），安装的 DR 系统为 13.3%（476/3575）。通过将 RR 测量与工作流程分析相结合，确定了技术和教学干预的目标。这些干预措施将 RR 降低到便携式 CR 的 1.8%（81/4476）和安装的 DR 的 8.2%（306/3748）。
我们发现直接数字胸部射线摄影的 RR 明显高于计算机胸部射线摄影。我们认为这是由于重复获得和丢弃图像变得更加容易，这表明需要对 RR 进行持续监测。我们能够证明，在基于胶片成像的时代制定的降低 RR 的策略可以适应数字环境。基于我们的发现，我们鼓励放射科医生评估他们自己部门的直接数字胸部射线摄影的 RR，并在必要时考虑类似的干预措施，以达到该模式的可接受 RR。
