Sensitivity, specificity, and accuracy of detecting ASPECTS regional infarctions <3 hours old (n = 280) with a follow-up DWI reference standard*
| Imaging | TP | FP | FN | TN | Sensitivity | Specificity | Accuracy |
|---|---|---|---|---|---|---|---|
| NCCT | 44 | 0 | 58 | 180 | 44.0 [28.5–56.1] | 100 [97.3–100] | 80.0 [73.3–85.4] |
| CTA-SI | 57 | 1 | 43 | 179 | 57.0 [41.4–68.1] | 99.4 [96.3–99.9] | 84.3 [77.7–89.2] |
| CT-CBV | 91 | 0 | 9 | 180 | 91.0†‡ [83.5–95.3] | 100 [97.3–100] | 96.8†‡ [94.1–98.3] |
Note:—NCCT indicates noncontrast CT; CTA-SI, CT angiography source image; CT-CBV, CT perfusion cerebral blood volume maps; TP, true-positive; FP, false-positive; FN, false-negative; TN, true-negative.
* Sensitivity, specificity, and accuracy values are expressed in percentages with 95% CIs in brackets.
† Significantly different compared with NCCT.
‡ Significantly different compared with CTA-SI.