Which of the following describes the process of ascending venography?

Ascending venography is a technique that typically involves the injection of a contrast agent into a deeper vein, such as the common femoral vein (CFV), not a superficial vein. This method allows for imaging of the venous system, particularly to evaluate conditions like deep vein thrombosis or venous abnormalities. The correct detail in this imaging technique includes using contrast in the deep venous system, generally starting from a central location like the knee or CFV to ascend through the venous system.

The process involves obtaining images after the contrast fills the veins, providing a detailed view that can help diagnose various vascular conditions. While superficial veins can also be visualized, they are not the primary focus of ascending venography, which is meant to assess the deeper venous structures as opposed to superficial venous issues.

In this context, understanding the methodology behind ascending venography emphasizes the importance of the correct venous anatomy being targeted during the procedure. While injections into other structures such as the aorta may be relevant to different types of imaging, they don’t apply directly to the ascension and evaluation of veins in venography.