Table 3 Diagnostic performance of qualitative (visual) data of ASL-MRI of both cerebral hemispheres (n = 52) of the studied patients (n = 26)
Inter-ictal visual qualitative analysis PASL-MRI results | Region of abnormal perfusion | Total | ||||||
|---|---|---|---|---|---|---|---|---|
Temporal | Extra-temporal | |||||||
No | % | No | % | No | % | |||
Non-localization and non-lateralization | 1 | 3.85% | 0 | 0% | 1 | 3.85% | ||
Well-localized and well-lateralized (21; 80.77%) | Isolated ipsilateral focal hypoperfusion | 14 | 53.84% | 4 | 15.38% | 18 | 69.22% | |
Isolated ipsilateral focal hyperperfusion | 1 | 3.85% | 1 | 3.85% | 2 | 7.68% | ||
Ipsilateral hypoperfusion (epileptogenic focus) with hypopefusion of the ipsilateral thalamus | 0 | 0% | 1 | 7.68% | 1 | 3.85% | ||
False-localization (2; 7.68%) | Ipsilateral focal hypoperfusion of multiple cerebral lobes of the epileptogenic hemisphere including the epileptogenic irritative zone and associated ipsilateral cerebral areas of seizure spread, and focal hypopefusion of the ipsilateral thalamus | 1 | 3.85% | 0 | 0% | 1 | 3.85% | |
Ipsilateral focal hypoperfusion of multiple cerebral lobes of the epileptogenic hemisphere including the epileptogenic irritative zone and associated ipsilateral cerebral areas of seizure spread | 1 | 3.85% | 0 | 0% | 1 | 3.85% | ||
False-lateralization (2; 7.68%) | Ipsilateral hypoperfusion (epileptogenic focus) with hypopefusion of the contra-lateral lobes and/or contra-lateral thalamus | 1 | 3.85% | 0 | 0% | 1 | 3.85% | |
Ipsilateral focal hypoperfusion (epileptogenic focus) with focal hypoperfusion of the corresponding contralateral homologous (mirror focus) | 0 | 0% | 1 | 3.85% | 1 | 3.85% | ||
Total | 19 | 73.08% | 7 | 26.92% | 26 | 100% | ||
Sensitivity, specificity, PPV, NPV and accuracy of visual analysis of PASL-MRI results in the inter-ictal state | ||||||||
Sensitivity % | Specificity % | PPV % | NPV % | Accuracy % | ||||
90.48 | 87.10% | 82.61% | 93.10% | 88.46% | ||||