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DSA analysis of the cerebral arteries and its clinical significance

LI Xiao, GUAN Yong-song, ZHOU Xiang-ping, et al.Department of Radiology,West China Hospital, Sichuan University, Chengdu 610041, China  
Objective: To explore the projective rules of cerebral arteries and the displaying rate of their main branches during cerebral angiographic examination. Methods: 51 cases normal series images were selected from the DSA images of 140 cases of cerebral angiogram randomly. The main revealed branches were analyzed at lateral and anteroposterior projection via ICA and VA. The projective rules of A1 segment, M1 segment and P1 segment were deduced respectively. Their anatomical characteristics and variation were also summarized separately. Results: Variations of the cerebral arteries at the base of the brain were very common. Table 2 and table 3 showed the displaying rate of main vessel branches of ICA and VA. Table 4 showed the projective rules of A1 , M1 and P1 segment on anteroposterior view. Table 5 showed the projective rules of OA, PCoA and AChA on lateral view. Conclusions: Although existing complicated anatomic relation among the vessels on the base of the brain, the courses of them can be described briefly as level, ascending and descending and so on for the DSA images. The hemodynamics of the cerebral arteries can be also reflected on the image vividly by adjusting the projective positions.
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