Struelens L, Vanhavere F, Bosmans H, Van Loon R, Geukens M
SCK.CEN, Boeretang 200, 2400 Mol, Belgium.
Radiat Prot Dosimetry. 2005;117(1-3):87-92. doi: 10.1093/rpd/nci733. Epub 2006 Feb 3.
In this study, patient doses were analysed against exposure parameters and procedure protocol. Patient doses were measured in seven hospitals for a standard diagnostic vascular examination. Image quality was assessed using the contrast-detail phantom from Nijmegen (CD-DISC 2.0). A link between dose and image quality was investigated. Image quality strongly depends on the preset dose level. The higher the dose level, the better the image quality, but also the higher the patient dose. However, no clear correlation was found between total dose-area product (DAP) or effective dose and image quality. A large range in patient dose was found: DAP (22-130 Gy cm2) and effective dose (3.9-16.8 mSv). A difference in number of frames was also found in the different centres, owing to different frame rates (3-2-1 frames per second) and use of oblique projections. Differences in doses and exposure settings offer the possibility of optimising patient doses in angiography and interventional radiology.
在本研究中，针对曝光参数和操作流程对患者剂量进行了分析。在七家医院对标准诊断性血管造影检查的患者剂量进行了测量。使用奈梅亨的对比细节体模（CD-DISC 2.0）评估图像质量。研究了剂量与图像质量之间的联系。图像质量很大程度上取决于预设的剂量水平。剂量水平越高，图像质量越好，但患者剂量也越高。然而，未发现总剂量面积乘积（DAP）或有效剂量与图像质量之间存在明显相关性。发现患者剂量范围很大：DAP为（22 - 130 Gy cm²），有效剂量为（3.9 - 16.8 mSv）。由于帧率不同（每秒3 - 2 - 1帧）以及使用斜位投影，不同中心的帧数也存在差异。剂量和曝光设置的差异为优化血管造影和介入放射学中的患者剂量提供了可能性。
