Which term describes the process used to verify the placement of a radiation treatment portal?

The term that accurately describes the process used to verify the placement of a radiation treatment portal is "Portal Verification." This process is critical in radiation therapy, as it ensures that the radiation beams are directed precisely to the intended treatment area. Portal verification involves the use of imaging techniques to confirm the accurate alignment of the treatment fields according to the planned treatment protocol.

This step is fundamental in maintaining patient safety and treatment efficacy, as any misalignment can lead to inadequate treatment or unnecessary exposure of healthy tissue to radiation. The terminology emphasizes the verification aspect, highlighting that this is not merely a visual inspection but a systematic confirmation of the treatment setup against the predefined parameters.

The other terms provided, while they may seem relevant, do not capture the specific nature of the process required in clinical practice for radiation treatment verification.