No abstract

In this paper, an approach to analyze the bone mineral density (BMD) based on microwave reflectivity is presented The proposed method enables us to overcome the health risks associated with diagnostic techniques such as X‐rays for repeated study of the rate of mineralization in the case of fractures or de‐mineralization in the case of osteoporosis. The proposed method is used to demonstrate the application of microwaves for continuous observation of skull healing process during post‐cranial surgery period. The proposed technique can be a potential clinical model in future for extracting target characteristics such as bone deposition thickness and other cranial defects. Based on the conclusions of wideband measured data and signal processing techniques, we propose to design the Transceiver using ultra‐wideband (UWB) pulsed technology. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:21–26, 2017

No abstract

In recent studies, it has been found that fat tissue can be used as a microwave communication channel. In this article, the effect of thickness inhomogeneities in fat tissues on the performance of in-body microwave communication at 2.45 GHz is investigated using phantom models. We considered two models namely concave and convex geometrical fat distribution to account for the thickness inhomogeneities. The thickness of the fat tissue is varied from 5 mm to 45 mm and the Gap between the transmitter/receiver and the starting and ending of concavity/convexity is varied from 0 mm to 25 mm for a length of 100 mm to study the behavior in the microwave propagation. The phantoms of different geometries, concave and convex, are used in this work to validate the numerical studies. It was noticed that the convex model exhibited higher signal coupling by an amount of 1 dB (simulation) and 2 dB (measurement) compared to the concave model. From the study, it was observed that the signal transmission improves up to 30 mm thick fat and reaches a plateau when the thickness is increased further. Index Terms-microwaves, dielectric properties, fat tissue, concave, convex, intra-body communication, fat channel, phantom.

No abstract