Performance evaluation of accelerated functional MRI acquisition using compressed sensing

Functional MRI (fMRI) has been widely accepted as a standard tool to study the function of brain. However, because of the limited temporal resolution of MR scanning, researchers have experienced difficulties in various event related cognitive studies which usually require higher temporal resolution than the current acquisition protocol. Even if several accelerated fMRI methods have been proposed to overcome the limited temporal resolution, the results have not been widely accepted since there were concerns whether the result came from blood oxygen level-dependent (BOLD) signal or artifacts due to down sampling. The main contribution of this paper is to propose a new high spatio-temporal resolution fMRI technique based on compressed sensing theory and to justify the performance using receiver operating characteristic (ROC) curve.