Table 2.
Parenchymal, vascular, and perfusion imaging selection using either CT or MRI across clinical scenarios and time windows
| Clinical scenario #1: Patient is 65 years old Altered level of consciousness, aphasia, dense right hemiplegia with sensory deficit NIHSS of 21 | Clinical scenario #2: Patient is 65 years old Altered level of consciousness, aphasia, dense right hemiplegia with sensory deficit NIHSS of 21 with early improvement to 5 | Clinical scenario #3: Patient is 65 years old Facial weakness, mild limb weakness NIHSS of 5 | Clinical scenario #4: Patient is 65 years old Facial weakness, hemiparesis NIHSS of 10 | |||||||||
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| Parenchymal | Vascular | Perfusion | Parenchymal | Vascular | Perfusion | Parenchymal | Vascular | Perfusion | Parenchymal | Vascular | Perfusion | |
| 0–3 h | 25% (203) | 37% (299) | 38% (305) | 21% (53) | 37% (92) | 42% (107) | 19% (102) | 38% (210) | 43% (238) | 28% (68) | 32% (77) | 40% (97) |
| 6 h | 19% (138) | 23% (160) | 56% (394) | 18% (43) | 28% (64) | 54% (126) | 19% (74) | 28% (110) | 53% (238) | 19% (44) | 27% (62) | 54% (126) |
| 6-h post ET | 12% (38) | 25% (83) | 63% (207) | 11% (12) | 22% (23) | 67% (71) | 10% (19) | 26% (50) | 64% (125) | 8% (9) | 25% (26) | 67% (71) |
| 10 h | 37% (85) | 24% (55) | 39% (91) | Scenario not surveyed at this time window | 38% (88) | 28% (63) | 34% (78) | 32% (73) | 29% (68) | 39% (89) | ||
| Wake-up | 15.5% (36) | 25.5% (59) | 59% (135) | Scenario not surveyed at this time window | 27% (62) | 24% (55) | 49% (112) | 18% (42) | 24% (54) | 58% (131) | ||
CT: Computed Tomography; ET: Endovascular Trial; MRI: Magnetic Resonance Imaging; NIHSS: National Institutes of Health Stroke Scale.