Experimental Characterization of a Personal Wireless Sensor Network for the Medical X-Ray Dosimetry
Experimental Characterization of a Personal Wireless Sensor Network for the Medical X-Ray Dosimetry
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DOI：
10.1109/tim.2016.2534661
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发表时间：
2016-09-01
影响因子：
5.6
通讯作者：
Servoli, Leonello
中科院分区：
文献类型：
--
作者：
Magalotti, Daniel;Placidi, Pisana;Servoli, Leonello
无线传感器网络是大规模监测的重要技术，提供高时间和空间分辨率的传感器测量。在医疗保健应用中，已经设计和制造了各种系统原型和商业产品，旨在为医疗程序期间的实时操作员监控提供替代且更有效的方法。在实时主动像素剂量测定项目的框架中，人们的注意力集中在介入放射学 (IRad) 操作员的剂量监测上。传感器网络已经开发出来，由多个个人传感器节点（PSN）组成，监测操作员身体不同位置（例如头部或手臂）的吸收剂量，并为每个医疗程序提供吸收剂量的测量结果。在本文中，我们通过测量辐射图并将系统暴露于直接 X 射线束来描述系统最终版本的首次表征，显示剂量率高达 3.3 mGy/s 的响应线性。当网络中同时使用两个 PSN 时，系统已在多个 IRad 过程中进行了表征。测量了网络的数据包错误率，并评估了每个医疗程序的吸收剂量，结果表明，相对于参考剂量测定设备，剂量测量的不确定度低于 10%。
Wireless sensor networks are an important technology for large-scale monitoring, providing sensor measurements at high temporal and spatial resolution. In healthcare applications, a variety of system prototypes and commercial products have been designed and manufactured with the aim to provide an alternative and more efficient method for real-time operator monitoring during medical procedures. In the framework of the Real-Time Active Pixel Dosimetry project, the attention has been focused on dose monitoring of interventional radiology (IRad) operators. A sensor network has been developed, which consists of several personal sensor nodes (PSNs), monitoring the absorbed dose in different positions of the operator body (e.g., on the head or arms) and providing a measurement of the absorbed dose for each medical procedure. In this paper, we describe the first characterization of the final version of a system by measuring the radiation diagram and exposing the system to a direct X-ray beam showing a linearity of the response up to 3.3 mGy/s of dose rate. The system has been characterized during several IRad procedures when two PSNs have been simultaneously used in the network. The packet error rate of the network has been measured and the absorbed dose has been evaluated for each medical procedure, showing an uncertainty on the dose measurement lower than 10% with respect to the reference dosimetric devices.