What is the strongest radiation therapy?

Could you elaborate on what you consider to be the strongest radiation therapy currently available? Are there specific types or modalities that you believe stand out in terms of their efficacy and potential benefits for patients? Are there any recent advancements or breakthroughs in this field that have led to the emergence of more potent forms of radiation therapy? How do these stronger therapies compare to traditional methods in terms of safety, side effects, and overall treatment outcomes?