Number of studies, percentage of studies and median, mean, minimal and maximal sample size per contrast category in retrospective (a) and prospective (b) studies.

Abbreviations: ASL = arterial spin labeling; CEST = chemical exchange saturation transfer; DCE = dynamic contrast enhanced; DTI = diffusion-tensor imaging; DWI = diffusion-weighted imaging; FLAIR = fluid-attenuated inversion recovery; FMRI = functional magnetic resonance imaging; IVIM = intravoxel incoherent motion imaging; LGE = late gadolinium enhancement; MRA = magnetic resonance angiogram; PD = proton density; UTE = ultrashort echo time. (DOCX)