. 2021 Feb 11;34(2):365–370. doi: 10.1007/s12028-021-01192-6

Table 2.

Feature-based Common Data Elements

Case report form	Feature-based CDEs
CT	Hypodensity, hyperdensity, enhancement
MRI	Decreased volume, increased volume, diffusion restriction, T2-weighted hyperintensity, susceptibility-weighted or T2*-weighted hypointensity, enhancement, cystic changes
CT Perfusion	CBF, MTT, Time to peak, or TMax abnormalities
MR Perfusion	CBF, MTT, Time to peak, or TMax abnormalities
MR Spectroscopy	Metabolite abnormalities: N-acetyl- aspartate, Choline, Creatine, Myo-inositol, Lactate, Glutamine/glutamate
PET	Localization of tracer uptake

CBF cerebral blood flow, CDE common data element, CT computed tomography, MTT mean transit time, MRI magnetic resonance imaging, TMax time to maximum