Verschuyl E J, Kaatee R, Beek F J, Patel N H, Fontaine A B, Daly C P, Coldwell D M, Bush W H, Mali W P
Department of Radiology, University of Washington Medical Center, Seattle 98195, USA.
Radiology. 1997 Oct;205(1):115-20. doi: 10.1148/radiology.205.1.9314972.
To determine the best projection angles for imaging the renal artery origins in profile.
A mathematical model of the anatomy at the renal artery origins in the transverse plane was used to analyze the amount of aortic lumen that projects over the renal artery origins at various projection angles. Computed tomographic (CT) angiographic data about the location of 400 renal artery origins in 200 patients were statistically analyzed.
In patients with an abdominal aortic diameter no larger than 3.0 cm, approximately 0.5 mm of the proximal part of the renal artery and origin may be hidden from view if there is a projection error of +/-10 degrees from the ideal image. A combination of anteroposterior and 20 degrees and 40 degrees left anterior oblique projections resulted in a 92% yield of images that adequately profiled the renal artery origins. Right anterior oblique projections resulted in the least useful images.
An error in projection angle of +/-10 degrees is acceptable for angiographic imaging of the renal artery origins. Patients sex, site of interest (left or right artery), and local diameter of the abdominal aorta are important factors to consider.
确定用于肾动脉起始部轮廓成像的最佳投照角度。
利用肾动脉起始部横断面解剖结构的数学模型，分析在不同投照角度下投射于肾动脉起始部上方的主动脉管腔量。对200例患者400个肾动脉起始部位置的计算机断层扫描（CT）血管造影数据进行统计学分析。
在腹主动脉直径不大于3.0 cm的患者中，如果投照角度与理想图像存在±10度的偏差，肾动脉近端及起始部约0.5 mm可能无法显示。前后位与左前斜位20度和40度相结合的投照方式，能使92%的图像充分显示肾动脉起始部轮廓。右前斜位投照得到的图像最不理想。
肾动脉起始部血管造影成像时，±10度的投照角度误差是可以接受的。患者性别、感兴趣的部位（左或右动脉）以及腹主动脉的局部直径是需要考虑的重要因素。
