44 research outputs found
Brain–computer interface using fMRI: spatial navigation by thoughts
No full textA brain-computer interface (BCI) is a way of conveying an individual's thoughts to control computer or electromechanical hardware. Capitalizing on the ability to characterize brain activity in a reproducible manner, we explored the possibility of using real-time fMRI to interpret the spatial distribution of brain function as BCI commands. Using a high-field (3T) MRI scanner, brain activities associated with four distinct covert functional tasks were detected and subsequently translated into predetermined computer commands for moving four directional cursors. The proposed fMRI-BCI method allowed volunteer subjects to navigate through a simple 2D maze solely through their thought processes.This study was partially supported by the KoreanMinistry of Science and Technology
(grantNo.M1-0107-07-0001)
On the Effectiveness of Doubly Adaptive Estimation for Dynamic MRI Sequence Acquisition
No full textWe present experimentally-acquired MR image sequence reconstruction results and a review of the recently proposed doubly adaptive temporal update method (DATUM) for the acquisition of dynamic MRI sequences. The DATUM algorithm is novel in providing an estimation and tracking framework for both image reconstruction and the image acquisition inputs
Reduced field‐of‐view MRI with two‐dimensional spatially‐selective RF excitation and UNFOLD
No full textFat–water selective excitation in balanced steady-state free precession using short spatial–spectral RF pulses
No full text
