In Regard to Mohan et al

To the Editor: We enjoyed the critical review by Mohan et al discussing technical improvements to empower proton therapy (PT) (1). They acknowledge a lack of data showing PT delivers better clinical outcomes than photon therapy (1, 2) and suggest this is because most of the experience to date is with passive scattering PT, which is dosimetrically inferior to intensity modulated PT (IMPT). They argue that if the limitations of IMPT can be addressed, the clinical benefits of PT will become apparent.

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