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Abstract #5476

Complex-valued analysis of high-resolution SSFP-fMRI increases reliability in detecting active voxels

Vahid Malekian1, Arash Foroudi Ghasemabadi1, and Abbas Nasiraei Moghaddam1,2

1Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran (Islamic Republic of), 2School of Cognitive Sciences, Institute for research in fundamental sciences (IPM), Tehran, Iran (Islamic Republic of)

In this study, we evaluated the reliability of the results of a complex-valued analysis that uses both magnitude and phase data in a SSFP-fMRI technique. From the activation map of complex analysis and the corresponding magnitude one, we selected the common active voxels and calculated the average z-score over all of them. By observing an approximately 9.4% increase of z-score in complex maps compared to magnitude ones, we can conclude that by using both magnitude and phase data we are able to increase the confidence and reliability of detecting active voxels. Therefore, complex analysis method can be promising in evaluating SSFP-fMRI methods.

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