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目的 探讨确定脑血管旋转DSA任意 1帧图像投照角度的可行性。方法 通过模型试验获得旋转血管造影数次旋转的有关数据 ,采用数据拟合方法得到描述X线机旋转规律近似的数学表达式。使用可编程手持器实现对 2 3例脑血管旋转DSA任意 1帧图像投照角度的实时计算。结果 所有 2 3例脑血管旋转DSA中 ,可编程手持计算器均可立即计算出每一个感兴趣图像的投照角度。其中颅内动脉瘤 14例 ,左前颅凹脑膜瘤 1例 ,颅内大脑动静脉畸形 8例。对比由计算器获得的图像与旋转DSA相对应的图像 ,两者在显示异常动脉的起源、形态、走行、分布以及病变的供血动脉和引流静脉等诸方面 ,具有较好的相似性。结论 实时确定脑血管旋转DSA任意图像的投照角度 ,对准确诊断与治疗颅内脑血管异常具有重要作用
Objective To explore the feasibility of determining the projection angle of any one frame of cerebrovascular rotation DSA. Methods The data of several rotations of revolving angiography were obtained through model test. The mathematical expressions describing the rotation law of X - ray machines were obtained by data fitting method. Real-time calculation of projection angle of any one frame of DSA in 23 cases of cerebrovascular rotation with programmable hand-held device. Results All 23 patients with cerebrovascular rotation DSA, programmable hand-held calculator can immediately calculate the projection of each image of interest angle. Including intracranial aneurysm in 14 cases, 1 case of left anterior cranial pit meningioma, intracranial cerebral arteriovenous malformation in 8 cases. Comparing the image obtained by the calculator with the image corresponding to the revolving DSA, both of them show good similarity in the aspects of the origin, shape, movement, distribution and pathological changes of the donor arteries and draining veins. Conclusions Real-time determination of the projection angle of any image of cerebrovascular rotation DSA plays an important role in the accurate diagnosis and treatment of intracranial cerebrovascular abnormalities