Reading Imagined Letter Shapes from the Mind’s Eye Using Real-time 7 Tesla fMRI
Reading Imagined Letter Shapes from the Mind’s Eye Using Real-time 7 Tesla fMRI
复制标题
使用实时 7 特斯拉功能磁共振成像从心灵的眼睛中读取想象的字母形状
DOI:
10.1109/bci53720.2022.9735031
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
M. Senden
中科院分区:
文献类型:
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作者:
R. Goebel;Rick van Hoof;Salil Bhat;M. Lührs;M. Senden
We present a 7 Tesla fMRI proof-of-concept study of the first letter speller BCI that decodes imagined letter shapes from activity patterns in early visual cortical areas. New tools are developed to enable real-time population receptive field retinotopic mapping for encoding and decoding. Using two different letter shapes (H and T), classification performance of generated activity patterns during imagery reaches 80% accuracy in each individual. Using a denoising autoencoder, recognizable letter shapes could be reconstructed and displayed as feedback to participants in the scanner.