Experimental Characterization of a Wireless Personal Sensor Node for the Dosimetry During Interventional Radiology Procedures
Experimental Characterization of a Wireless Personal Sensor Node for the Dosimetry During Interventional Radiology Procedures
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DOI：
10.1109/tim.2015.2476279
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发表时间：
2016-05-01
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
以便携式设备为特征的无线传感器网络广泛用于医疗保健应用，如实时患者监测。对于这样的应用，设计约束在每个节点的能量、网络容量（短通信范围和低带宽）以及处理和内存资源方面受到限制。在实时主动像素剂量计项目的框架内，关注的重点是设计用于介入放射学（IRad）操作员在线剂量监测的剂量计系统。本文描述了在几个IRad程序中使用的原型的实验特性。通过测量不同场景下网络的分组错误率，对原型无线链路进行了表征：最差结果低于0.4%，对于具体应用来说是可以接受的。该样机还与参考采集系统进行了比较，以充分验证系统在运行状态下的有效性。在所有工作条件下的观测值之间已观察到线性相关。此外，平均像素响应可以用作给定程序的数据采集质量的指标，表明它不依赖于程序，因此依赖于扩散辐射的特定频谱。最后，计算了不同辐照程序的吸收剂量（μ Gy）。
Wireless sensor networks featuring portable devices are widely used for healthcare applications such as real-time patient monitoring. For such applications, design constraints are limited in the amount of energy, network capacity (short communication range and low bandwidth), and processing and memory resources in each node. In the framework of the real-time active pixel dosimetry project, the attention has been focused on the design of a dosimetric system for online dose monitoring of interventional radiology (IRad) operators. This paper describes the experimental characterization of the prototype used during several IRad procedures. The wireless link of the prototype has been characterized by measuring the packet error rate of the network in different scenarios: the worst obtained result was lower than 0.4%, which is acceptable for the specific application. The prototype has also been compared with a reference acquisition system to fully validate the system in operating condition. A linear correlation has been observed between the observables for all the working conditions. Moreover, the average pixel response could be used as an indicator of the goodness of the data acquisition for a given procedure showing that it does not depend on the procedure, hence on the particular spectrum of the diffused radiation. Finally, the measurement of absorbed dose (mu Gy) has been calculated for different IRad procedures.