Simple estimation method of radio propagation by using CT images for implantable wireless body area networks

The present paper describes an estimation method of signal attenuation between an implanted and out-body wireless devices by using computer tomography (CT) images. This estimation method is applicable into radio link accessment for implanted wireless body are network (WBAN). In order to evaluate its accuracy of the estimates, received signal strength (RSS) is measured when a signal generator is placed in esophagus and duodenum of a participant. As a result of a comparison between the measured RSS and estimates, the error of the estimation is less than 10 dB in 75% positions.