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. 2019 Jul 5;11(7):946. doi: 10.3390/cancers11070946

Figure 1.

Figure 1

Depth–dose distribution of protons and relationship to energy and linear energy transfer (LET). (A) An unmodulated (pristine) Bragg peak produced by a proton beam. (B) Spread-out Bragg peak (SOBP) from several modulated proton beams.