Unsupervised Segmentation of Head Tissues from Multi-modal MR Images for EEG Source Localization.
In this paper, we present and evaluate an automatic unsupervised segmentation method, hierarchical segmentation approach (HSA)-Bayesian-based adaptive mean shift (BAMS), for use in the construction of a patient-specific head conductivity model for electroencephalography (EEG) source localization. It...
| Published in: | Journal of Digital Imaging Vol. 28; no. 4; pp. 499 - 515 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Published: |
Springer Nature
Aug2015
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=109625951&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 109625951 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 08971889 DOQ jtl: Journal of Digital Imaging issn: 08971889 maglogo: N pubinfo: dt: Aug2015 vid: 28 iid: 4 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 109625951 108352953 10.1007/s10278-014-9752-6 NLM25533494 PMC4501958 109625951 ppf: 499 ppct: 16 formats: fmt: @attributes: type: P tig: atl: Unsupervised Segmentation of Head Tissues from Multi-modal MR Images for EEG Source Localization. aug: au: Mahmood, Qaiser Chodorowski, Artur Mehnert, Andrew Gellermann, Johanna Persson, Mikael affil: Universitätsklinik für Radioonkologie, Tübingen 72076 Germany sug: ab: In this paper, we present and evaluate an automatic unsupervised segmentation method, hierarchical segmentation approach (HSA)-Bayesian-based adaptive mean shift (BAMS), for use in the construction of a patient-specific head conductivity model for electroencephalography (EEG) source localization. It is based on a HSA and BAMS for segmenting the tissues from multi-modal magnetic resonance (MR) head images. The evaluation of the proposed method was done both directly in terms of segmentation accuracy and indirectly in terms of source localization accuracy. The direct evaluation was performed relative to a commonly used reference method brain extraction tool (BET)-FMRIB's automated segmentation tool (FAST) and four variants of the HSA using both synthetic data and real data from ten subjects. The synthetic data includes multiple realizations of four different noise levels and several realizations of typical noise with a 20 % bias field level. The Dice index and Hausdorff distance were used to measure the segmentation accuracy. The indirect evaluation was performed relative to the reference method BET-FAST using synthetic two-dimensional (2D) multimodal magnetic resonance (MR) data with 3 % noise and synthetic EEG (generated for a prescribed source). The source localization accuracy was determined in terms of localization error and relative error of potential. The experimental results demonstrate the efficacy of HSA-BAMS, its robustness to noise and the bias field, and that it provides better segmentation accuracy than the reference method and variants of the HSA. They also show that it leads to a more accurate localization accuracy than the commonly used reference method and suggest that it has potential as a surrogate for expert manual segmentation for the EEG source localization problem. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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