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Razvoj programskega orodja za lokalizacijo elektrod pri elektroencefalografiji
ID Mokotar, Rok (Author), ID Demšar, Jure (Mentor) More about this mentor... This link opens in a new window, ID Kraljič, Aleksij (Comentor)

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Abstract
Za preučevanje delovanja možganov se pogosto uporabljata elektroencefalografija in funkcijska magnetna resonanca. Prva nudi izjemno časovno ločljivost, druga pa prostorsko natančnost, zato njuna integracija v okviru multimodalnega slikanja zagotavlja celovitejši vpogled v možgansko aktivnost. Ključen pogoj za uspešno združitev teh metod je natančna lokalizacija elektrod, torej določanje njihovih prostorskih položajev glede na anatomske strukture posameznika, kar pa ostaja tehnično zahteven in časovno potraten postopek. V sklopu magistrskega dela smo ta izziv naslovili z razvojem novega, avtomatiziranega cevovoda, ki nadgrajuje odprtokodno orodje Electrode Localization Kit. Predlagan pristop temelji na standardizaciji tridimenzionalnih skenov glave ter uporabi naprednih metod računalniškega vida, ki vključujejo analizo oblike, barve in regij ter segmentacijo superpikslov. Evalvacija je potrdila izrazit napredek v praktični uporabnosti. Razvita metodologija je približno podvojila hitrost celotnega postopka, zmanjšala potrebo po ročnih interakcijah za štirikrat ter izboljšala zanesljivost z več kot trikratnim zmanjšanjem napačnih zaznav elektrod.

Language:Slovenian
Keywords:lokalizacija elektrod, soregistracija EEG-fMRI, rekonstrukcija virov, 3D-skeniranje, računalniški vid
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FRI - Faculty of Computer and Information Science
Year:2025
PID:20.500.12556/RUL-177282 This link opens in a new window
COBISS.SI-ID:263027715 This link opens in a new window
Publication date in RUL:19.12.2025
Views:309
Downloads:176
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Secondary language

Language:English
Title:Development of a software tool for electrode localization in electroencephalography
Abstract:
Electroencephalography and functional magnetic resonance imaging are widely used to study brain function, offering complementary strengths in temporal sensitivity and spatial precision. Integrating these methods enables a more comprehensive understanding of neural activity. A crucial requirement for their successful combination is the accurate localization of electrodes, i.e., the precise determination of their spatial positions relative to each individual's anatomical structures. However, this task remains technically demanding and time-consuming. This master's thesis addresses this challenge by developing a new automated processing pipeline that extends the capabilities of the open-source Electrode Localization Kit. The approach introduces standardized three-dimensional head scans, along with advanced computer-vision techniques that employ shape, color, and region analysis, as well as superpixel segmentation. The evaluation of the proposed methodology demonstrates a substantial advance in practical usability. It approximately doubles overall processing speed, reduces the need for manual intervention by a factor of four, and improves reliability through more than a threefold reduction in false electrode detections.

Keywords:electrode localization, EEG-fMRI co-registration, source reconstruction, 3D-scanning, computer vision

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