Clinical apparatus for the reduction of dose area product for patients undergoing x-ray catheterization.
Clinical apparatus for the reduction of dose area product for patients undergoing x-ray catheterization.
复制标题
用于减少接受 X 射线导管插入术的患者剂量面积积的临床设备。
DOI：
10.1118/1.4903898
复制
发表时间：
2015
期刊：
影响因子：
3.8
通讯作者：
Rowlands,JohnA
中科院分区：
文献类型：
--
作者：
Robert,Normand;Watt,KristinaN;Rochette,Sophie;Desponds,Lionel;Vaillant,Régis;Rowlands,JohnA
目的设计一种患者前感兴趣区衰减器（ROIAs），以减少临床使用的剂量面积积（DAP）。作者描述了一个模型，用于预测在存在或不存在roia的情况下获得的图像序列的临床过程中记录的x射线技术参数的DAP值。该模型的建立主要是为了确定在没有ROIA的情况下，接受心脏导管插管的患者的DAP是多少，从而确定DAP的减少。方法构建厚度逐渐变化的scopper roia，以避免造成明显的图像伪影。采用不同的X射线技术参数，在有或没有roia的临床导管系统上获得X射线图像序列。使用电离室测量了所有上述暴露的DAP值，并与作者开发的模型进行了比较。结果与电离室测量结果相比，该模型在考虑或不考虑roia的情况下预测DAP值的平均误差在3.5%以内。结论所提出的实验设计足以测量在患者导管成像过程中引入ROIA时预期的1.5-3.5量级的DAP降低。
PurposeThe authors describe a design for prepatient region of interest attenuators (ROIAs) to reduce dose area product (DAP) for clinical use. The authors describe a model to predict DAP values from x‐ray technique parameters recorded during a clinical procedure for image sequences obtained in the presence or absence of ROIAs. The model was developed primarily to determine what the DAP to a patient undergoing cardiac catheterization with a ROIA would have been if no ROIA had been used allowing a determination of DAP reduction.MethodsCopper ROIAs with thicknesses that vary gradually so as not to cause significant image artifacts were constructed. X‐ray image sequences were acquired on a clinical catheterization system with and without ROIAs with varying x‐ray technique parameters. DAP values were measured for all said exposures using an ionization chamber and compared to a model the authors developed.ResultsThe model can predict DAP values within 3.5% on average with or without ROIAs when compared to ionization chamber measurements.ConclusionsThe proposed experimental design is adequate for measuring DAP reductions on the order of 1.5–3.5 that are expected when introducing a ROIA during patient catheterization imaging.