The extraction of olfactory evoked potentials in human brain using independent component analysis - Based approach

Po Lei Lee, C. H. Shu, H. C. Chang, C. H. Wu

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Patients suffering from olfaction impairment are incapable of judging the smell of delicious food and fragrance. Their lack of smell vigilance might also make them unaware of danger environments, e.g., the leakage of carbon-oxide (CO). Traditional examination in clinics uses Sniffin sticks, which store odorants in sticks, and requests subjects to subjectively report what smell they have sensed. Nevertheless, subject's subjective feeling may inevitably bias the examination results. Accordingly, a objective method for olfactory examinations in otolaryngology clinics is needed. In this study, we tried to develop an objective method on magnetoencephalography (MEG) for olfaction examination by extraction olfactory evoked fields (OEF). Owing to the high noise level in MEG data, independent component analysis (ICA) was adopted to removal OEF-unrelated noises. ICA can decompose the measured EEG data into different independent components (IC). ICs were clustered into different groups based on their spatial weight over MEG channels, and only those ICs with spatial mapping closed to second somatosensory area (SII) were utilized for signal reconstruction. The source locations of extracted OEF signals were superimposed on individual anatomical MRI for display purpose. The proposed method may provide an efficacious way to enhance the SNR of OEFs.

原文???core.languages.en_GB???
主出版物標題World Congress on Medical Physics and Biomedical Engineering
主出版物子標題Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics
發行者Springer Verlag
頁面1071-1074
頁數4
版本4
ISBN(列印)9783642038815
DOIs
出版狀態已出版 - 2009
事件World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics - Munich, Germany
持續時間: 7 9月 200912 9月 2009

出版系列

名字IFMBE Proceedings
號碼4
25
ISSN(列印)1680-0737

???event.eventtypes.event.conference???

???event.eventtypes.event.conference???World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics
國家/地區Germany
城市Munich
期間7/09/0912/09/09

指紋

深入研究「The extraction of olfactory evoked potentials in human brain using independent component analysis - Based approach」主題。共同形成了獨特的指紋。

引用此