دورية أكاديمية
أعرض في EDS

Effects of fixed cutoff filtering on dark- and light-adapted ERG components and the application of variable cutoff filter.

التفاصيل البيبلوغرافية
العنوان: Effects of fixed cutoff filtering on dark- and light-adapted ERG components and the application of variable cutoff filter.
المؤلفون: Gao M; Department of Mechatronics, Optics and Mechanical Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary., Barboni MTS; Department of Ophthalmology, Semmelweis University, Budapest, Hungary.; Department of Experimental Psychology, University of Sao Paulo, Sao Paulo, Brazil., Ventura DF; Department of Experimental Psychology, University of Sao Paulo, Sao Paulo, Brazil., Nagy BV; Department of Mechatronics, Optics and Mechanical Engineering Informatics, Budapest University of Technology and Economics, Budapest, Hungary. nagyb@mogi.bme.hu.
المصدر: Documenta ophthalmologica. Advances in ophthalmology [Doc Ophthalmol] 2022 Jun; Vol. 144 (3), pp. 191-202. Date of Electronic Publication: 2021 Sep 24.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Kluwer Country of Publication: Netherlands NLM ID: 0370667 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1573-2622 (Electronic) Linking ISSN: 00124486 NLM ISO Abbreviation: Doc Ophthalmol Subsets: MEDLINE
أسماء مطبوعة: Publication: Dordrecht : Kluwer
Original Publication: s'-Gravenhage [etc.]
مواضيع طبية MeSH: Electroretinography*/methods , Eye*, Adolescent ; Adult ; Dark Adaptation ; Humans ; Oscillometry ; Photic Stimulation/methods ; Young Adult
مستخلص: Purpose: Human oscillatory potentials (OPs) are derived from dark-adapted (DA) electroretinograms (ERGs) with fixed frequency cutoff filters while light-adapted (LA) OPs are generally not isolated from ERGs. Our purpose was to analyze the effect of cutoff frequencies on DA and LA ERG components using a series of fixed and variable filters.
Methods: DA and LA ERGs were recorded from 10 healthy eyes of 10 subjects (mean age = 20.5 ± 6.7 years) following ISCEV standards. Each signal was filtered in the Fourier domain to acquire slow (a- and b-waves; below cutoff frequency) and fast (OPs; above cutoff frequency) components. Fixed cutoff frequencies ranged from 60 to 105 Hz and a variable cutoff frequency was calculated. Results were analyzed with statistical tests and specific models.
Results: DA ERG components were slightly influenced by the filter cutoff frequency. In contrast, fixed and variable filters significantly changed LA components: the lower the cutoff frequency the smaller the b-wave and OP3 and the higher the OP2/OP4 amplitudes. Analyzing the filter frequency limits a transition range between 68.9 Hz and 83.9 Hz was observed where amplitudes vary.
Conclusions: The present report shows that DA OPs may be isolated from ERGs using filtering procedures with high-pass cutoff frequency at about 75 Hz as recommended by ISCEV. On the other hand, the spectral distribution of low-frequency and high-frequency LA ERG components may overlap. Accordingly, filtering the signal using different cutoff frequencies is not necessarily separating b-wave and OPs.
(© 2021. The Author(s).)
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فهرسة مساهمة: Keywords: Cutoff frequency; Electroretinogram; ISCEV standard; Oscillatory potentials; Retina; Spectral analysis; Variable filter
تواريخ الأحداث: Date Created: 20210924 Date Completed: 20220615 Latest Revision: 20220922
رمز التحديث: 20221213
مُعرف محوري في PubMed: PMC9192464
DOI: 10.1007/s10633-021-09853-9
PMID: 34559355
قاعدة البيانات: MEDLINE
الوصف
تدمد:1573-2622
DOI:10.1007/s10633-021-09853-9