Yu-Sheng Tseng1, Yao-Wen Chang1, Teng-Yi Huang1
1National Taiwan University of Science and Technology, Taipei, Taiwan
This study attempts exploiting multi-focal functional MRI(fMRI) for retinotopic mapping, or retinotopy, in the primary visual cortex. We tried to reconstruct visual image according the retinotopy and brain activities obtained by fMRI. We empirically found that the accuracy of the reconstructed visual image largely depended on the threshold selection. Therefore, this study proposed an approach to find the optimal threshold according to a receiver operating characteristic analysis. The results obtained with 10 participatns volunteers using the optimized t thresholds demonstrated an average accuracy of 81%.