Betsou S, Efstathopoulos E P, Katritsis D, Faulkner K, Panayiotakis G
Medical Physics Department, School of Medicine, University of Patras, Greece.
Br J Radiol. 1998 Jun;71(846):634-9. doi: 10.1259/bjr.71.846.9849387.
The objective of the present project was the determination of the dose received by patients during cardiac procedures, such as coronary angiography, percutaneous transluminal coronary angioplasty (PTCA) and stent implantation. Thermoluminescent dosemeters (TLDs), suitably calibrated, were used for the measurement of the dose received at four anatomical locations on the patient's skin. A dose-area product (DAP) meter was also used. The contribution of cinefluorography to the total DAP was higher than that of fluoroscopy. A DAP to effective dose conversion factor equal to 0.183 mSv Gy-1 cm-2 was estimated with the help of a Rando phantom. Thus, the effective dose received by the patients could be assessed. Mean values of effective dose equal to 5.6 mSv, 6.9 mSv, 9.3 mSv, 9.0 mSv and 13.0 mSv were estimated for coronary angiography, PTCA, coronary angiography and ad hoc PTCA, PTCA followed by stent implantation and coronary angiography and ad hoc PTCA followed by stent implantation, respectively.
本项目的目的是测定患者在心脏手术过程中所接受的剂量，这些手术包括冠状动脉造影、经皮腔内冠状动脉成形术（PTCA）和支架植入术。使用经过适当校准的热释光剂量仪（TLD）来测量患者皮肤上四个解剖位置所接受的剂量。还使用了剂量面积积（DAP）仪。电影荧光成像对总DAP的贡献高于荧光透视。借助兰多人体模型估算出剂量面积积与有效剂量的转换系数为0.183 mSv Gy-1 cm-2。因此，可以评估患者所接受的有效剂量。对于冠状动脉造影、PTCA、冠状动脉造影及临时PTCA、PTCA后行支架植入术以及冠状动脉造影及临时PTCA后行支架植入术，估算出的有效剂量平均值分别为5.6 mSv、6.9 mSv、9.3 mSv、9.0 mSv和13.0 mSv。
