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作者首先建立了一个包括肾动脉开口及近侧部的腹主动脉的简易横断面数学模型,以估计在不同投照角度下,充盈对比剂的主动脉对肾动脉开口及近侧部的掩盖情况。同时利用螺旋CT血管成像对200例病人的400条肾动脉的开口位置及分布进行了分析,以确定获得满意肾动脉开口及近侧部图像的最佳投照角度。最后得出如下结论:①当病人肾动脉
The authors first established a simple cross-sectional mathematical model of the abdominal aorta that included the opening and proximal portion of the renal artery to estimate the masking of the opening and the proximal portion of the renal artery at different angles of contrast with contrast-filled aortas . At the same time, the position and distribution of 400 renal arteries in 200 patients were analyzed by spiral CT angiography to determine the optimal projection angle of satisfactory renal artery opening and proximal part images. Concluded the following conclusions: ① when the patient’s renal artery