Abstract
This study was designed to compare the test-retest precision of functional magnetic resonance imaging (fMRI) data processed with independent component analysis (ICA) and the same data analyzed with a conventional model-dependent method (Student's-t mapping). Volunteers underwent two or three iterations of visual and auditory stimuli, while data were collected for fMRI scans. The scan data were separately processed with ICA and with Student's-t mapping (STM). As a measure of test-retest precision, concurrence ratios were calculated for each subject and each task as the number of voxels that were activated by two iterations of a task divided by the average number of voxels activated in each repetition. In 28 test-retest comparisons, the average concurrence ratio was 0.69±0.10 for ICA and 0.65±0.13 for the conventional method, a statistically insignificant difference. In fMR image data of block stimulus paradigms, ICA had similar test-retest precision to a conventional model-dependent method.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Electronic Publication
Rights and permissions
About this article
Cite this article
Nybakken, G., Quigley, M., Moritz, C. et al. Test-retest precision of functional magnetic resonance imaging processed with independent component analysis. Neuroradiology 44, 403–406 (2002). https://doi.org/10.1007/s00234-001-0722-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00234-001-0722-6