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Miniaturizing Proton Therapy: A Technical Challenge With Unclear Clinical Impact

      Recent technical developments in proton therapy on the miniaturization of the irradiation equipment and an increasing interest in smaller proton therapy facilities have cheaper therapy and wider use as their goals. Although smaller facilities, and even ones with a single treatment room, are already in clinical operation, the major technological steps to take this to the next level will need a long time until their introduction into clinical practice. This editorial gives an overview of these developments and an explanation of the current situation regarding technological innovations in clinical practice.
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