Enabling communication and localization technologies for wireless capsule endoscopy

doctoral thesis

• Title (croatian): Tehnologije za potporu komunikacije i lokalizacije bežične endoskopske kapsule
• Author: Katjana Ladić https://orcid.org/0009-0008-4691-0671
• Mentor: Dina Šimunić (mentor)
• Mentor: Kamran Sayrafian https://orcid.org/0000-0002-1395-7448 (komentor)
• Committee member: Krešimir Malarić (predsjednik povjerenstva)
• Committee member: Zvonimir Šipuš (član povjerenstva)
• Committee member: Konstantinos Katzis https://orcid.org/0000-0002-1470-2105 (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2024-04-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Universal decimal classification (UDC): 004 - Computer science and technology. Computing. Data processing

Abstract

As one of the BAN applications, wireless Capsule Endoscopy offers a painless visualization of the entire gastrointestinal tract and is currently the only diagnostic technology that can examine the whole length of small intestine. The research in this thesis focuses on two communication technologies, Ultra-Wideband and Human Body Communication, that can meet the higher data rate and lower communication power consumption requirements for the next generation capsules.
For UWB, a statistical pathloss model, incorporating antenna orientation and body tissue impact, was obtained using a developed 3D immersive platform with a detailed computational model, practical antennas, and an innovative methodology that enables judicious placement of the capsule inside the small intestine. Partial model verification and the impact of the measurement points distribution on the pathloss exponent was also presented.
The obtained pathloss was contributed to the IEEE revision of BAN standard and accepted as a standard channel model document for capsule endoscopy use-case.
Time domain analysis was preformed to characterize the channel and analyze multipath propagation. In addition, the algorithms to estimate the orientation of the capsule inside the small intestine using a received signal strength were developed.
To study HBC, a parametric FEM-based platform including a full 3D computational human body model was developed. This customizable platform allows comprehensive study of the HBC channel by considering different electrode sizes and placements on the surface and inside the body.

Abstract (croatian)

Bežična endoskopija kapsulom nudi bezbolnu vizualizaciju probavnog trakta i trenutno je jedina dijagnostička tehnologija koja može pregledati cijelu dužinu tankog crijeva. Istraživanje u ovom radu usredotočeno je na dvije komunikacijske tehnologije, Ultra-Wideband i Human Body Communication, koje mogu zadovoljiti zahtjeve veće brzine prijenosa podataka i manju potrošnje energije za sljedeću generaciju endoskopskih kapsula.
Za UWB, statistički model gubitka putanje, koji uključuje orijentaciju antene i utjecaj organa i tkiva, dobiven je korištenjem razvijene 3D imerzivne platforme s detaljnim računalnim modelom čovjeka, praktičnim antenama i inovativnom metodologijom koja omogućuje promišljeno postavljanje kapsule unutar tankog crijeva. Također je prikazana djelomična verifikacija modela i utjecaj distribucije mjernih točaka na eksponent gubitka puta. Dobiveni model gubitaka prihvaćen je kao standardni dokument modela kanala za primjenu kod endoskopije kapsulom u nadolazećoj IEEE reviziji BAN standarda.
Analiza vremenske domene izvršena je kako bi se okarakterizirao kanal u vremenskoj domeni i analiziralo višestazno širenje. Također, razvijeni su algoritmi za procjenu orijentacije kapsule unutar tankog crijeva pomoću metode jačine primljenog signala.
Za proučavanje HBC tehnologije, razvijena je parametarska FEM platforma koja uključuje 3D računalni model ljudskog tijela. Ova prilagodljiva platforma omogućuje sveobuhvatno proučavanje HBC kanala uzimajući u obzir različite veličine elektroda i položaje na površini i unutar ljudskog tijela.

• Keywords: capsule endoscopy; computational human body models; statistical pathloss model; ultra-wideband; time response; multipath propagation; human body communication; capacitive coupling
• Keywords (croatian): endoskopska kapsula; računalni model ljudskog tijela; statistički model gubitaka; prijenosna karakteristika; ultraširokopojasna tehnologija; vremenski odziv signala; višestazno širenje signala; prostiranje signala unutar ljudskog tijela; prijenos signala ljudskim tijelom
• Language: english
• URN:NBN: urn:nbn:hr:168:798896
• Promotion: 2024
• Study programme: Title: Computer Science; Study programme type: university; Study level: postgraduate; Academic / professional title: Doktor znanosti (Doktor znanosti)
• Type of resource: Text
• Extent: 108 str. : graf. prikazi
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-05-16 07:48:04