| Paper: | BIO-L1.2 | ||
| Session: | Medical Imaging | ||
| Time: | Tuesday, May 16, 16:50 - 17:10 | ||
| Presentation: | Lecture | ||
| Topic: | Bio Imaging and Signal Processing: Biomedical signal processing | ||
| Title: | Adaptive Filtering of fMRI Data Based on Correlation and BOLD Response Similarity | ||
| Authors: | Joakim Rydell, Hans Knutsson, Magnus Borga, Linköping University, Sweden | ||
| Abstract: | In analysis of fMRI data, it is common to average neighboring voxels in order to obtain robust estimates of the correlations between voxel time-series and the model of the signal expected to be present in activated regions. We have previously proposed a method where only voxels with similar correlation coefficients are averaged. In this paper we extend this idea, and present a novel method for analysis of fMRI data. In the proposed method, only voxels with similar correlation coefficients and similar time-series are averaged. The proposed method is compared to our previous method and to two well-known filtering strategies, and is shown to have superior ability to discriminate between active and inactive voxels. | ||
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