Using Quantitative CT Perfusion for Evaluation of Delayed Cerebral Ischemia Following Aneurysmal Subarachnoid Hemorrhage

Supplemental Online Materials

Files in this Data Supplement:

• Online Appendix, Tables and Figures (PDF) -
  
  Appendix: See PDF
  
  Online Table 1: Imaging characteristics of the study population and subgroup
  
  Online Table 2: Quantitative analysis of CTP parameters for the study population and subgroup
  
  Online Figure 1: Flow diagram for the reference standard. Note that the assignment of patients in the study by the reference standard at each level is in parentheses.
  
  Online Figure 2: Flow diagram for patient enrollment.
  
  Online Figure 3: A 30-year-old woman presented with acute SAH and underwent coil embolization of a left middle cerebral artery (MCA) ruptured aneurysm. The patient developed new right-sided upper extremity weakness on day 7. A, Noncontrast CT of the head demonstrates minimal evolving SAH in the sulci (arrows). There is no new hemorrhage, infarction, or hydrocephalus to indicate another cause for the symptoms. B, The CTP MTT map demonstrates prolongation (red) in the transit time involving the left anterior and MCA territories (arrows). C, The CTP CBF map reveals matched areas of reduced (blue) cortical blood flow (arrows). D, The CTP CBV map has symmetric blood volume without a notable perfusion deficit. E, DSA anteroposterior view with injection of the left internal carotid artery performed on day 7 demonstrates marked narrowing of the ACA and MCA (arrows), representing severe vasospasm.