Correlation between signal-to-noise ratios and region of interest sensitivity ratios of bipolar EEG measurements |
| |
Authors: | Juho Väisänen Jaakko Malmivuo Jari Hyttinen |
| |
Institution: | (1) Department of Biomedical Engineering, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland |
| |
Abstract: | We have developed a parameter, which describes how well the measurement is concentrated on the region of interest source area
compared to other source areas in the volume conductor. The parameter concept is called the region of interest sensitivity
ratio (ROISR). We assume that ROISR is also connected to the SNR of the measurement. The objective of the present study was
to investigate the assumed correlation between the ROISR and SNR of the measurement with three-layer spherical head model.
We studied how the source distribution and orientation affect the correlation and thus how applicable the ROISR is in analysing
the sensitivity distributions of measurements. We simulated bipolar EEG-evoked potential measurements with 16 combinations
of four-source distribution and four-source orientation models. The results indicate that the ROISR correlates with the SNR
of the measurement with all tested source distributions and orientations. Thus the ROISRs concept can be applied to analyse
measurement setups by modelling and analysing the sensitivity distributions. |
| |
Keywords: | Electroencephalography Modelling Region of interest sensitivity ratio Signal-to-noise ratio Sensitivity distribution |
本文献已被 PubMed SpringerLink 等数据库收录! |