What is a primary feature of a 3D treatment planning system (TPS)?

A primary feature of a 3D treatment planning system (TPS) is that it integrates multiple advanced functionalities that improve the overall treatment process.

The ability to represent patient information in three dimensions allows for a more accurate delineation of tumor boundaries and surrounding organs at risk, enabling tailored treatment that conforms to the shape of the tumor while minimizing exposure to healthy tissue.

Moreover, 3D TPSs have significantly enhanced homogeneity corrections compared to previous systems, which translates to more uniform dose distribution within the target volume. This improvement is crucial for ensuring an effective treatment while reducing the occurrence of adverse effects.

In addition, treatment plan optimization is a critical feature of 3D TPSs. This includes the sophisticated algorithms that help to refine treatment plans, ensuring that dose distributions meet specific clinical goals and reduce complications.

Considering that all these features — patient information visualization in 3D, enhanced homogeneity corrections, and effective treatment plan optimization — are integral components of a modern 3D treatment planning system, it is evident that the choice including all of these aspects is indeed the most comprehensive and accurate representation of what defines a 3D TPS.