Fink U, Heywang S, Mayr B, Berger H
Department of Radiology, Klinikum Grosshadern, University of Munich.
Eur J Radiol. 1989 Nov;9(4):236-40.
Digital subtraction angiography (DSA) plays an important role in the management of vascular diseases of the lower extremities. A disadvantage is the lack of an automatically moving table top. We used a 1,024 x 1,024 matrix with a large-screen intensifier system and an automated "stepping" facility. In 161 examinations of the arteries of the lower extremity digital peripheral arteriography was performed with and without the subtraction technique. We compared the influence of different iodine concentrations in DA and DSA. Peripheral DA proved to be equal to peripheral DSA in the region of the pelvis, thigh and knee, with no adequate contrasting being obtained merely in the region of the lower leg arteries in about 45%. It is necessary to use contrast medium at a concentration of 300 mg I/ml. The installation of an automated "stepping" facility reduces the amount of contrast medium needed and the exposure time.
数字减影血管造影（DSA）在下肢血管疾病的治疗中起着重要作用。其一个缺点是缺乏自动移动的检查床。我们使用了具有大屏幕增强器系统和自动“步进”功能的1024×1024矩阵。在161例下肢动脉检查中，分别采用了有和没有减影技术的数字外周动脉造影。我们比较了不同碘浓度在数字动脉造影（DA）和数字减影血管造影（DSA）中的影响。结果表明，在骨盆、大腿和膝部区域，外周DA与外周DSA效果相当，仅在小腿动脉区域约45%的情况下造影效果不佳。有必要使用浓度为300mg I/ml的造影剂。自动“步进”功能的设置减少了所需造影剂的用量和曝光时间。
