Posterior Cerebral Artery Angle and the Rupture of Basilar Tip Aneurysms
Figure 2
3D model of BTA aneurysm depicting angular variables of the surrounding vasculature.
There were three vessel to vessel angles -measured. The Parent-Daughter angle is a composite angle that refers to the average of the two angles formed between the basilar artery (BA) and each posterior cerebral artery (RPCA, LPCA). The P1-P1 angle refers to the angle formed between the two posterior cerebral arteries (RPCA, LPCA). The SCA-SCA angle refers to the angle formed between the two superior cerebellar arteries (RSCA, LSCA).