Proceedings ArticleDOI
Performance comparison between TOA- and RSSI-based localization methods for wireless capsule endoscopy systems
Takahiro Ito,Daisuke Anzai,Jianqing Wang +2 more
- pp 139-143
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TLDR
The proposed TOA-based method for joint location/relative permittivity estimation can achieve not only better localization accuracy than that of the RSSI-based localization but also accurate averaged relative permittivities estimation.Abstract:
A wireless capsule endoscope (WCE) is a promising medical device for diagnosis of digestive organs, which takes pictures inside digestive organs, such as large and small intestines and transmits them through implant wireless communications. In a realistic WCE scenario, it is important to precisely estimate the WCE location. Generally, the superiority of TOA-based localization over RSSI-based localization has been pointed out in many papers in wireless communication systems. However, because the propagation speed inside of a human body varies due to the influence of its biological tissues (namely, the relative permittivity of human tissues), the realization of precise TOA-based localization needs to accurately estimate the propagation velocity of implant communication signals. So, in this paper, we propose a TOA-based method for joint location/relative permittivity estimation, and then compare the performances between TOA- and RSSI-based WCE location estimation methods. Our computer simulation results reveal that, the TOA-based localization with accurate relative permittivity information outperforms the RSSI-based localization in terms of the localization accuracy, whereas the RSSI-based localization is advantageous if accurate relative permittivity is not obtained. Additionally, the proposed TOA-based localization can achieve not only better localization accuracy than that of the RSSI-based localization but also accurate averaged relative permittivity estimation.read more
Citations
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Journal ArticleDOI
Precision of EM Simulation Based Wireless Location Estimation in Multi-Sensor Capsule Endoscopy
TL;DR: A localization precision investigation for an RF endoscopy pill as it passes through an individuals gastrointestinal tract shows that the number of receiver antennas on the exterior of the body has higher impact on the precision of the location than the amount of capsules in collaboration within the GI region.
Journal ArticleDOI
Review of Computational Techniques for Performance Evaluation of RF Localization Inside the Human Body
TL;DR: The scope of this study is an assessment of the precision of TOA- and RSS-based ranging in the proximity of anthropomorphic tissue by means of simulation software designed to mimic signal transmission in the human body environment.
Journal ArticleDOI
Non-Parametric Approach of Video Capsule Endoscope Localization Using Suboptimal Method of Position Bounded CWCL
Umma Hany,Lutfa Akter +1 more
TL;DR: This paper proposes an algorithm of localizing the capsule using path loss-based calibrated weighted centroid localization (CWCL), and proposes a realistic suboptimal method of estimating the calibration coefficient and proposes two boundary conditions on the estimated positions to improve the localization accuracy.
Journal ArticleDOI
Non-Parametric Approach Using ML Estimated Path Loss Bounded WCL for Video Capsule Endoscope Localization
Umma Hany,Lutfa Akter +1 more
TL;DR: This paper proposes path loss bounded weighted centroid localization (PB-WCL) algorithm to estimate 3-D coordinate position of the VCE and observes that the proposed position bounded PB- WCL shows significantly improved performance and outperforms the existing literature.
Proceedings ArticleDOI
Quasi-Static Magnetic Localization of Capsule Endoscopes with an Active Integrated Coil
TL;DR: In this article, a low-frequency magnetic localization method for capsule endoscopes with an integrated active coil is proposed, considering the spatial constraint, the limited battery capacity and the ferromagnetic battery shell of commercial capsules.
References
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Journal ArticleDOI
Capsule endoscopy: the localization system
TL;DR: The Localization Module is an additional feature incorporated into the RAPID Workstation Software of the Given Imaging system to assist the physician in determining the relative location of pathologies found by the M2A capsule.
Proceedings ArticleDOI
Body Area Network and Its Standardization at IEEE 802.15.MBAN
TL;DR: Some aspects of BAN are foresees, including possible application areas and usage models, and some wireless communication technologies are compared for their suitability in supporting BAN.
Proceedings ArticleDOI
A localization method using 3-axis magnetoresistive sensors for tracking of capsule endoscope.
TL;DR: A non-invasive tracking method, which has the potential to be used for localization of the capsule endoscope, and it is demonstrated that the accuracy of the localization is related to the number of sensors.
Journal ArticleDOI
RF Localization for Wireless Video Capsule Endoscopy
Kaveh Pahlavan,Guanqun Bao,Yunxing Ye,Sergey N. Makarov,Umair Khan,Pranay Swar,David R. Cave,Andrew Karellas,Prashant Krishnamurthy,Kamran Sayrafian +9 more
TL;DR: This paper describes how it can design a cyber physical system (CPS) for experimental testing and visualization of interior of the human body that can be used for solving the RF localization problem for the endoscopy capsule.
Proceedings ArticleDOI
Design of ultra wide-band low-band implant antennas for capsule endoscope application
TL;DR: This paper investigated two kinds of design of implant antennas in ultra wide-band (UWB) low- band (3.4-4.8 GHz) for capsule endoscopes and proposed a simplified planar design of the hemispherical loop antenna for being easy to fabricate.