Damascelli B, Garbagnati F, Ceglia E, Milella M
Diagn Imaging. 1981;50(3):113-29.
The difference between the specific gravity of blood and contrast medium and the consequent tendency of contrast media to fill the lower tissues is exploited in abdominal angiography by special positioning of patients: prone for the coeliac, hepatic and mesenteric arteries, prone with the legs raised for abdominal aortography; lateral decubitus on the side of interest for renal angiography. The advantages are better parenchymal opacification, increased contrast and improved details. Gravity positioning saves time and material, and is easy to learn.
血液与造影剂比重的差异以及造影剂随之产生的充盈较低组织的倾向，在腹部血管造影中通过患者的特殊体位得以利用：腹腔动脉、肝动脉和肠系膜动脉造影时采用俯卧位；腹主动脉造影时采用双腿抬高的俯卧位；肾动脉造影时采用患侧卧位。其优点是实质器官显影更好、对比度增加且细节更清晰。重力体位节省时间和材料，且易于掌握。
