A common antecubital vein used for intravenous administration of a radiopharmaceutical is the?

The cephalic vein is often chosen for intravenous administration of radiopharmaceuticals due to its accessibility and position in the antecubital fossa, which is the anterior region of the elbow. This vein runs along the lateral aspect of the forearm, making it easier to locate and puncture with a needle.

In the context of intravenous procedures, the cephalic vein is less likely to be involved in frequent movement compared to other veins, such as the brachial or ulnar veins, which are more centrally located and can be obscured by surrounding structures. Additionally, the radial vein may also be an option, but it is generally smaller and less favored for larger volume infusions, which are common with radiopharmaceuticals. Therefore, while several veins could technically be used, the cephalic vein provides a balance of visibility, size, and ease of access for these types of medical procedures.