In Vivo Characterization of a Wireless Telemetry Module for a Capsule Endoscopy System Utilizing a Conformal Antenna
In Vivo Characterization of a Wireless Telemetry Module for a Capsule Endoscopy System Utilizing a Conformal Antenna
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DOI：
10.1109/tbcas.2017.2759254
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发表时间：
2018-02-01
影响因子：
5.1
通讯作者：
Desmulliez, Marc P. Y.
中科院分区：
文献类型：
--
作者：
Faerber, Julia;Cummins, Gerard;Desmulliez, Marc P. Y.
本文描述了在10 mm x 30 mm胶囊式内窥镜外部创建的共形螺旋天线的设计、制造、包装和性能表征，该胶囊式内窥镜设计用于在人体组织内以433 MHz的载波频率运行。在集成胶囊系统和外部接收器之间建立了无线数据传输。在组织体模和体内猪模型中测试遥测系统。测试了两种不同类型的传输模式。第一种模式，复制正常操作条件，使用0 dBm稳定功率水平的数据包，同时胶囊以稳定速率从小肠中取出。第二种模式复制了小肠内胶囊滞留的最差情况临床场景，在胶囊固定到位的情况下，以逐步增加的-10、0、6和10 dBm功率水平发送数据。使用嵌入胶囊壳内的热敏电阻始终监测外部天线周围组织的温度，以观察潜在的安全问题。记录的数据显示，对于两种操作模式，根据IEEE标准，10（-3）分组错误率和10（-5）比特错误率的低错误传输以及组织的温度没有增加。
This paper describes the design, fabrication, packaging, and performance characterization of a conformal helix antenna created on the outside of a 10 mm x 30 mm capsule endoscope designed to operate at a carrier frequency of 433 MHz within human tissue. Wireless data transfer was established between the integrated capsule system and an external receiver. The telemetry system was tested within a tissue phantom and in vivo porcine models. Two different types of transmission modes were tested. The first mode, replicating normal operating conditions, used data packets at a steady power level of 0 dBm, while the capsule was being withdrawn at a steady rate from the small intestine. The second mode, replicating the worst-case clinical scenario of capsule retention within the small bowel, sent data with stepwise increasing power levels of -10, 0, 6, and 10 dBm, with the capsule fixed in position. The temperature of the tissue surrounding the external antenna was monitored at all times using thermistors embedded within the capsule shell to observe potential safety issues. The recorded data showed, for both modes of operation, a low error transmission of 10(-3) packet error rate and 10(-5) bit error rate and no temperature increase of the tissue according to IEEE standards.