Comparison of SIR values between FLAIR and EPI-FLAIR studies (n = 50)
| FLAIR SIR | EPI-FLAIR SIR | T Test (P Value) | |
|---|---|---|---|
| DWI negative | |||
| (−) FLAIR, (−) EPI-FLAIR (n = 12) | 1.02 ± 0.005 | 1.02 ± 0.006 | .2 |
| DWI positive | |||
| <4.5 hours of time from onset to MR imaging (n = 12) | 1.14 ± 0.08 | 1.10 ± 0.06 | .22 |
| >4.5 hours of time from onset to MR imaging (n = 22) | 1.36 ± 0.16 | 1.33 ± 0.17 | .83 |
| (+) FLAIR, (−) EPI-FLAIR (n = 2) | 1.15 ± 0.03 | 1.13 ± 0.05 | /Aa |
Note:—Data are mean ± standard deviation.
↵a In 2 discrepant cases, the SIR values were comparable. The sample was too small for evaluation with the t test.
In 4 patients with unknown time of presentation, the SIR values were concordant between FLAIR and EPI-FLAIR (SIR > 1.3, n = 3; SIR < 1.3, n = 1).