What is indicated by the simulation reference images?

The simulation reference images are primarily used to identify and confirm the isocenter location in radiation therapy planning. The isocenter is a key point in the treatment setup, representing the point around which the radiation beams converge and is crucial for ensuring that the targeted area receives the correct dose of radiation while minimizing exposure to surrounding healthy tissues.

Proper identification of the isocenter enhances accuracy in positioning the patient and the radiation delivery system, which is essential for effective treatment. By accurately referencing the isocenter, healthcare professionals can align the treatment fields precisely with the anatomical structures, which is vital for optimizing treatment outcomes.

In contrast, while energy levels, treatment techniques, and fractionation schedules are all important aspects of radiation therapy, they are not determined solely by simulation reference images. Instead, these factors are typically decided during the overall treatment planning process, taking into account the type of cancer, its location, and the treatment goals.