Editorial Comment: Free water corrected diffusion tensor imaging discriminates between good and poor outcome of comatose patients after cardiac arrest.

• Prediction of neurological outcome after cardiac arrest is a major ethical challenge. • Diffusion tensor imaging (DTI) is a promising prognostic tool in comatose patients assessing brain microstructural damages. • The combination of clinical data with whole-brain fractional anisotropy and mean diffusivity values appears more accurate to predict poor outcome.