Jeon CH, et al. – In this present study, the researchers aimed to compare the efficacy of brain computed tomography (CT) and diffusion–weighted magnetic resonance imaging (DW–MRI) to predict the neurologic outcome before targeted temperature management (TTM) in comatose cardiac arrest survivors. They recommended that for early prediction of neurologic outcome (i.e., before TTM), DW–MRI was potentially useful in cardiac arrest (CA) patients. The combination of grey matter to white matter ratio (GWR) on brain CT and that on DW–MRI appeared to improve the sensitivity for predicting neurologic outcome after the return of spontaneous circulation (ROSC) from CA rather than on each modality alone. To confirm these results, large prospective multicenter studies were needed.