Abstract
Ingestible Medical Devices (IMDs) have given a strong boost to the health sector by creating new horizons in the prevention, monitoring and treatment of diseases in the gastrointestinal (GI) tract. In this study, we numerically assess the telemetry link between an ingestible antenna and an on-body antenna which acts as a repeater. Both antennas can be incorporated in a complete Wireless Capsule Endoscopy (WCE) system. Two different scenarios are examined to assess the performance of the ingestible antenna inside the small intestine of an anatomical human model and the link with the on-body antenna. The ingestible antenna is placed in vertical and horizontal position inside the small intestine. It is found that a reliable communication link can be established, regardless the antenna orientation inside the small intestine, for a net input power of the ingestible antenna significantly lower than the maximum allowable power recommended by the IEEE safety guidelines
Highlights
Nowadays, people suffer from gastrointestinal (GI) diseases due to changes in their diets, environmental pollution, and mental stress
The on-body antenna is considered in free space and at a distance of 15 mm (Figure 3(c)) from the abdomen of the human model of Figure 3(a), in order to assess the effect of the human body in the on-body
The reflection coefficient frequency response of the ingestible antenna was studied inside a cubic model and an anatomical model in the MedRadio band
Summary
People suffer from gastrointestinal (GI) diseases due to changes in their diets, environmental pollution, and mental stress. Traditional wired gastrointestinal endoscopic systems that are most commonly used can induce discomfort or even pain in the patient and are related with limited test coverage of the GI tract [2]. WCE systems include an ingestible capsule, sensors and a data recorder. The sensors, which are connected with the data recorder, receive transmission data from the capsule and transfer them to the data recorder that is worn by the patient during the study. These sensors are placed on the patient as a sensor belt or a sensor array around the abdominal area. Low-frequency IMDs have been shown to be favorable for short range communication due to less absorption by human tissues [5], [6]
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