Table 1 Dataset description with patient demographics and acquisition details. (Legend: no. = number, Std = standard deviation, M/F = male/female, IQR = inter-quartile range, mAs = milliampere-seconds, kVp = kilovoltage peak, MCA = middle cerebral artery, BG = basal ganglia, PCA = posterior cerebral artery, CorRad WM = corona radiata white matter, and ACA = anterior cerebral artery, LVO = large vessel occlusion [ICA, M1, M2]).
From: Head CT deep learning model is highly accurate for early infarct estimation
Patient demographics | Training | Validation | Full Test Set: Various Location Infarcts | Subset Test Set: MCA-territory only Infarcts |
|---|---|---|---|---|
No. patients (stroke positive / negative) | 3566 (1896 / 1670) | 133 (66 / 67) | 364 (270 / 94) | 150 (90 / 60) |
No. NCCT series | 9528 | 338 | 364 | 150 |
Mean age (Std) | 65 (17) | 64 (17) | 68 (15) | 67 (17) |
Gender: M / F | 1779 (49.9%) / 1787 (50.1%) | 74 (55.6%) / 59 (44.4%) | 208 (57.1%) / 156 (42.9%) | 73 (48.7%) / 77(51.3%) |
Infarct volume ≥ 50 mL (no.) | 334 | 17 | 43 | 30 |
Infarct volume ≥ 20 mL (no.) | 641 | 19 | 88 | 60 |
Median DWI infarct volume, mL | 9.4 | 5.2 | 8.8 | 29.6 |
Stroke laterality (no., %) | Left: 137/270 (51) Right: 128/270 (47) Unilateral: 265/270 (98) Bilateral: 5/270 (2) | Left: 46/90 (51) Right: 44/90 (49) Unilateral: 90/90 (100) Bilateral: 0/90 (0) | ||
Stroke territory (no., %) | MCA: 183/270 (68) BG: 30/270 (11) PCA: 19/270 (7) CorRad WM: 14/270 (5) Brainstem: 13/270 (5) Cerebellum: 9/270 (3) ACA: 2/270 (1) | MCA: 90/90 (100) | ||
LVO (no., %) | No LVO (11/90 = 12%) Bilateral LVO (2/90 = 2%) Left LVO (34/90 = 38%) 3 partial, 2 M3 Right LVO (29/90 = 32%) 1 partial, 1 M3 No CTA (14/90 = 16%) | |||
Acquisition | ||||
Mean time from NCCT-to-DWI: stroke positive / stroke negative | 50 min / 16 h | 50 min / 9 h | 44 min / 16 h | 35 min / 19 h |
No. CT scans per vendor: GE Healthcare / Siemens (No. different CT models per vendor) | 2509 / 1184 | 88 / 54 | 284 / 80 | 110 / 40 (5 / 3) |
Range of years from which NCCT/DWI scans obtained | 2001–2019 | 2002–2019 | 2002–2019 | 2002–2019 |
Mean X-ray scanning current | 225 mA | 217 mA | 220 mA | 220 mA |
Mean X-ray scanning voltage | 119 kVp | 120 kVp | 120 kVp | 122 kVp |
