Just T, Laqua D, Husar P
Institute of Biomedical Engineering and Informatics, Ilmenau University of Technology, 98693 Ilmenau, Germany. thomas.just@ tu-ilmenau.de
Annu Int Conf IEEE Eng Med Biol Soc. 2011;2011:7662-5. doi: 10.1109/IEMBS.2011.6091888.
In clinical routine, measurements of human physiological parameters are very important. In this paper, a study of RF transmission from the inside to the outside of a biological body is described. In the course of this work, an overview of the state of the art of wireless biotelemetry and the basics of biological tissue attenuation are given. In addition, several prototype transmitters were designed and developed with frequencies ranging from 50 to 700 MHz. With these transmitters a study of an in-vivo transmission was run to measure realistic attenuation values of a living biological subject. In the evaluation phase, a prototype transmitter was placed in the esophagus, near the heart, of a narcotized living pig. This allows demonstrating the transmission out of an animal with human-like tissue properties. The results show a possible transmission at 58, 119, 240, 418 and 672 MHz with acceptable loss.
在临床常规中，人体生理参数的测量非常重要。本文描述了一项关于生物体内向体外的射频传输的研究。在这项工作过程中，给出了无线生物遥测技术的现状概述以及生物组织衰减的基础知识。此外，还设计并开发了几种频率范围为50至700 MHz的原型发射器。利用这些发射器进行了一项体内传输研究，以测量活体生物对象的实际衰减值。在评估阶段，将一个原型发射器放置在一只麻醉的活猪靠近心脏的食管中。这使得能够证明从具有类似人体组织特性的动物体内进行的传输。结果表明，在58、119、240、418和672 MHz频率下有可能进行传输，且损耗可接受。
