What defines the elements that specify the regimen in Radiant?

• A. Scheduling preferences
• B. Imaging modality details
• C. Total dose, dose per fraction, and number of fractions.
• D. Patient age and weight

Answer: (C)

The elements that define a Radiant regimen are the total dose, dose per fraction, and number of fractions. These three together set the prescription and determine how the dose accumulates over the treatment course, which in turn influences tumor control and normal tissue tolerance. Scheduling preferences relate to when treatment sessions occur, not the prescribed dose structure. Imaging modality details cover planning and verification imaging, not the actual dose prescription. Patient age and weight may affect planning considerations but do not define the regimen itself.