In SSD techniques, at what points are the beams weighted?

In SSD (Source-to-Skin Distance) techniques, the beams are weighted specifically at the Dmax points. The Dmax (maximum dose) refers to the depth at which the radiation dose is maximized for a given treatment plan. This is critical because the dose distribution of the radiation beam is not uniform; it varies with depth in tissue. Therefore, understanding and calculating the dose at Dmax allows the medical dosimetrist to effectively plan treatment to ensure that the tumor receives the intended dose while minimizing exposure to surrounding healthy tissues.

In SSD techniques, focusing beam weighting at the Dmax points helps in optimizing the treatment to achieve the desired distribution while keeping dose constraints in mind for surrounding organs at risk. It ensures that the maximum dose delivered is within clinically acceptable limits and provides the best chance of therapeutic success.