Fig 1.
NECT (a), MDCTA (b), and DSA (c and d) of a 72 years old female.
Transverse NECT demonstrates HBAS with extension into basilar branches (arrow in a). MDCTA confirmed BAO (b) and revealed multiple small collateral vessels (arrowhead) and preserved perfusion of the left superior cerebelli artery (arrow). DSA with the tip of the catheter placed in the middle basilar artery (asterisk) revealed occlusion of the basilar tip, both posterior cerebral arteries and the right sided superior cerebellar artery. The left sided superior cerebellar artery is still perfused (arrowhead in c). In this patient mechanical thrombectomy led to reperfusion of the basilar artery (d) and both posterior cerebral arteries (asterisk). Residual thrombus can be detected in the right posterior cerebral artery (arrow).
Table 1.
Final etiological diagnosis.
Fig 2.
Bland-Altman plots of intra- (a) and interobserver agreement (b) for Hounsfield unit measurements performed in the basilar artery.
Fig 3.
Receiver-operating characteristic (ROC) curve (a and b) and dot plot analysis (c and d).
ROC analysis derived from calculated differences in Hounsfield unit (HU) measurements and hematocrit (Hct) corrected HU measurements of occluded (+) and non-occluded (-) basilar artery.
Table 2.
Sensitivity, specificity, positive predictive value, and negative predictive value.