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
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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:
2022 10th International Winter Conference on Brain-Computer Interface (BCI)
影响因子:
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通讯作者:
M. Senden
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

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我们展示了一项7特斯拉fMRI概念验证研究,该研究对首字母拼写者BCI进行了研究,该研究可以从早期视觉皮层区域的活动模式中解码想象的字母形状。新工具的开发,使实时群体接受野视网膜定位映射编码和解码。使用两种不同的字母形状(H和T),在每个个体的图像中生成的活动模式的分类性能达到80%的准确率。使用去噪自动编码器,可识别的字母形状可以重建并作为反馈显示给扫描仪中的参与者。
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.