Easy-to-Swallow Wireless Telemetry

Yuce, Mehmet Rasit; Dissanayake, Tharaka

doi:10.1109/mmm.2012.2205833

Cited by 130 publications

(53 citation statements)

References 34 publications

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“…2 = σ S/m. However, through measurements of the reflection coefficient, i.e., 11 S parameter, we verified that the insulated dipoles covered properly the 2.36-2.5 GHz frequency band when submerged in our liquid phantom described above (Fig. 3).…”

Section: Phantom Aqueous Solutionsupporting

confidence: 64%

“…Although the expected radio propagation losses through biological tissues in the MICS band may not be as high as within 2360-2400 MHz or 2400-2483.5 MHz, the maximal channel bandwidth of 300 kHz allowed in the MICS band constrains the implantable devices to low data rate transmissions. Therefore, a number of other frequency bands have been considered for communication interfaces with medical implants and in-body electronic pills [11]- [13]. Wider channel bandwidths for novel and more sophisticated in-body wireless sensors and actuators may be exploited in frequency bands above 1 GHz at the expense of larger propagation losses.…”

mentioning

confidence: 99%

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Experimental Path Loss Models for In-Body Communications within 2.36-2.5 GHz

Chávez-Santiago

Garcia-Pardo

Fornés-Leal

et al. 2015

IEEE J. Biomed. Health Inform.

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Section: Phantom Aqueous Solutionsupporting

confidence: 64%

mentioning

confidence: 99%

Experimental Path Loss Models for In-Body Communications within 2.36-2.5 GHz

Chávez-Santiago

Garcia-Pardo

Fornés-Leal

et al. 2015

IEEE J. Biomed. Health Inform.

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“…This consideration corresponds to some practical in-body medical sensor applications like the WCE, in which quasiomnidirectional antennas are used to establish the IB2OB radio communication link because of the unpredictable orientation that the device can have as it travels inside the gastrointestinal (GI) tract [4]- [6].…”

Section: A In-body (Ib) Probing Antennamentioning

confidence: 99%

“…As mentioned in the Section I, spectrum regulations constrain the utilization of UWB to 3.1-10.6 GHz for indoor and outdoor propagation environments. Nevertheless, regulating the use of 1-3 GHz for in-body UWB transmissions [23] would be highly beneficial for the use of this RF technology in applications that demand high data transmission rates like the WCE [4]- [6]. …”

Section: Path Loss Modelmentioning

confidence: 99%

“…For instance, continuous glucose monitoring (CGM) systems [3] utilizing subcutaneous RF implantable sensors can contribute greatly to the self-management of diabetes. Other in-body sensors like the wireless capsule endoscope (WCE) [4]- [6] facilitate the diagnosis of disease in the small bowel, which is difficult to visualize with conventional endoscopic techniques.…”

Section: Introductionmentioning

confidence: 99%

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In-Body to On-Body Ultrawideband Propagation Model Derived From Measurements in Living Animals

Floor

Chávez-Santiago

Brovoll

et al. 2015

IEEE J. Biomed. Health Inform.

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Abstract-Ultra wideband (UWB) radio technology for wireless implants has gained significant attention. UWB enables the fabrication of faster and smaller transceivers with ultra low power consumption, which may be integrated into more sophisticated implantable biomedical sensors and actuators. Nevertheless, the large path loss suffered by UWB signals propagating through inhomogeneous layers of biological tissues is a major hindering factor. For the optimal design of implantable transceivers, the accurate characterization of the UWB radio propagation in living biological tissues is indispensable. Channel measurements in phantoms and numerical simulations with digital anatomical models provide good initial insight into the expected path loss in complex propagation media like the human body, but they often fail to capture the effects of blood circulation, respiration, and temperature gradients of a living subject. Therefore, we performed UWB channel measurements within 1-6 GHz on two living porcine subjects because of the anatomical resemblance with an average human torso. We present for the first time a path loss model derived from these invivo measurements, which includes the frequency-dependent attenuation. The use of multiple on-body receiving antennas to combat the high propagation losses in implant radio channels was also investigated. Index Terms-channel model, implant, in-body, in-vivo, path lossThis work is part of the MELODY Project-Phase II (Contract no. 225885), which is financially sponsored by the Research Council of Norway.

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Wireless Endoscopy

Yuce

Alıcı

Than

2014

Wiley Encyclopedia of Electrical and Electronics Engineering

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Wireless endoscopy device is a miniature medical device that travels through the digestive system to collect images or physiological data and transfers them to an external console worn by patients or to a nearby TV/computer for display and monitoring. The current commercial devices have a dimension of approximately 11 × 26 mm with the shape of a pill so as to reach areas such as the small intestine to obtain video images. These devices record and transmit images over approximately an eight hour journey through the gastrointestinal (GI) tract. A video‐based capsule device produces a large amount of data from high‐resolution cameras, which is delivered over a high capacity wireless link. The commercially available capsules operate based on passive motion with no control over its position or orientation. These devices operate using small batteries with limited energy source. This article discusses implementation issues and presents details of techniques for design of wireless capsule systems. In addition, it outlines new studies involving motion control, localization and wireless energy transfer to increase the battery life of current wireless capsule devices. These new features will enable the next generation wireless capsule endoscopy devices to actively navigate within the GI tract of the human body and enable new therapeutic operations. Finally, the limitations of current devices are discussed and future directions and design challenges are highlighted for designers and researchers.

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Easy-to-Swallow Wireless Telemetry

Cited by 130 publications

References 34 publications

Experimental Path Loss Models for In-Body Communications within 2.36-2.5 GHz

Experimental Path Loss Models for In-Body Communications within 2.36-2.5 GHz

In-Body to On-Body Ultrawideband Propagation Model Derived From Measurements in Living Animals

Wireless Endoscopy

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