The imaging-quiescent phenotype in thrombolysed acute ischemic stroke: a diffusion-weighted MRI–based deconstruction
Standard CT perfusion mismatch and hypoperfusion intensity ratio formulas are undefined when ischemic core or Tmax>6 s equals zero. Such “imaging-quiescent” patients remain uncharacterized. We quantified their prevalence and used DWI to separate CTP-undetected ischemia from DWI-negative presentations. We con...