Prieto C, Vano E, Fernández J M, Martínez D, Sánchez R
Medical Physics Service San Carlos University Hospital, 28040 Madrid, Spain.
Radiat Prot Dosimetry. 2011 Sep;147(1-2):83-5. doi: 10.1093/rpd/ncr273. Epub 2011 Jul 5.
The aim of this study was to evaluate patient doses in two interventional cardiology laboratories over a period of 1 y in which the imaging devices were changed from image intensifier (II) to flat detector (FD). Dosimetric data from a total of 1040 coronary angiography (CA) procedures and 1087 percutaneous transluminal coronary angioplasty (PTCA) procedures were gathered. During the period studied with II imaging, median values of dose area product were 28 Gy cm(2) for CA and 57 Gy cm(2) for PTCA. In the first half of the year with FD imaging, median values were 37 Gy cm(2) for CA and 89 Gy cm(2) for PTCA. A significant increase in patient doses was noticed in the early stages of use of FD technology for imaging IC procedures, while fluoroscopy time and number of images remained similar. A careful setting of the X-ray systems, after upgrading the imaging system, is essential to avoid unjustified increases in patient doses.
本研究的目的是评估在1年的时间里，两个介入心脏病学实验室中患者的剂量情况，在此期间成像设备从影像增强器（II）更换为平板探测器（FD）。收集了总共1040例冠状动脉造影（CA）手术和1087例经皮腔内冠状动脉成形术（PTCA）手术的剂量学数据。在使用II成像的研究期间，CA的剂量面积乘积中位数为28 Gy cm²，PTCA为57 Gy cm²。在使用FD成像的上半年，CA的中位数为37 Gy cm²，PTCA为89 Gy cm²。在将FD技术用于成像IC手术的早期阶段，注意到患者剂量显著增加，而透视时间和图像数量保持相似。在升级成像系统后，仔细设置X射线系统对于避免患者剂量不合理增加至关重要。
