Test-retest precision of functional magnetic resonance imaging processed with independent component analysis

Neuroradiology. 2002 May;44(5):403-6. doi: 10.1007/s00234-001-0722-6. Epub 2002 Mar 1.


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.

Publication types

  • Comparative Study

MeSH terms

  • Acoustic Stimulation
  • Adult
  • Brain / physiology*
  • Brain Mapping
  • Female
  • Humans
  • Magnetic Resonance Imaging / statistics & numerical data*
  • Male
  • Middle Aged
  • Photic Stimulation
  • Principal Component Analysis*
  • Regression Analysis
  • Reproducibility of Results