Gonzales John P, Moran Christopher, Silberzweig James E
Department of Radiology, Beth Israel Medical Center, First Avenue at 16th Street, New York, NY 10003; Department of Radiology, St. Luke's-Roosevelt Hospital Center, New York, New York.
Department of Radiology, Beth Israel Medical Center, First Avenue at 16th Street, New York, NY 10003; Department of Radiology, St. Luke's-Roosevelt Hospital Center, New York, New York.
J Vasc Interv Radiol. 2014 Mar;25(3):462-8, 468.e1. doi: 10.1016/j.jvir.2013.11.006. Epub 2013 Dec 12.
To quantify the reduction in operator exposure to scatter radiation by using an extension component in addition to a commonly used lower body radiation shield attached to an interventional radiology procedure table.
An anthropomorphic pelvis phantom was exposed to fluoroscopy at varying C-arm angles to simulate a standard interventional procedure. A MAVIG UT60 lower body shield (MAVIG, Munich, Germany) (48 cm × 78 cm, 0.5 mm lead equivalent), with an attachable extension component (48 cm × 36 cm), was suspended from the edge of the table adjacent to the pelvic phantom. Using a handheld Geiger counter, scatter radiation exposure rates were measured at the level of an operator's eye, chest, waist, and knee, with various C-arm angles both with and without the attachable extension component. Mean exposure rates for each experimental setup were calculated and compared.
Overall, scatter radiation exposures were lower with the addition of the extension component, with the largest reductions (> 80%) measured at the operator's waist and knee levels, for all C-arm angles. The highest reduction in scatter radiation exposure was measured at knee level, at 0 degrees left posterior oblique projection, where the use of the lower body shield extension component reduced the exposure rate from 4.80 mR/h to 0.44 mR/h (90.8% reduction, P < .001). Reductions in scatter radiation were less at eye and chest levels.
The use of the additional extension component to the lower body radiation shield can result in large (> 80%) reductions in operator scatter radiation exposure, particularly to the lower body.
除了在介入放射学手术台上使用常用的下半身辐射防护装置外，通过使用一个扩展部件来量化操作人员散射辐射暴露的减少情况。
将一个拟人化骨盆模型在不同的C形臂角度下进行荧光透视，以模拟标准的介入手术。一个MAVIG UT60下半身防护装置（MAVIG，德国慕尼黑）（48厘米×78厘米，0.5毫米铅当量），带有一个可连接的扩展部件（48厘米×36厘米），悬挂在靠近骨盆模型的手术台边缘。使用手持式盖革计数器，在操作人员的眼睛、胸部、腰部和膝盖水平测量散射辐射暴露率，测量时C形臂处于不同角度，且分别在有和没有可连接扩展部件的情况下进行。计算并比较每个实验设置的平均暴露率。
总体而言，添加扩展部件后散射辐射暴露较低，在所有C形臂角度下，在操作人员的腰部和膝盖水平测量到的减少幅度最大（>80%）。在左后斜位0度投影时，膝盖水平的散射辐射暴露减少最多，此时使用下半身防护装置扩展部件将暴露率从4.80毫伦琴/小时降至0.44毫伦琴/小时（减少90.8%，P<.001）。眼睛和胸部水平的散射辐射减少较少。
在下半身辐射防护装置上使用额外的扩展部件可使操作人员的散射辐射暴露大幅减少（>80%），尤其是对下半身的暴露。
