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. 2020 Jun 22;15(6):e0229053. doi: 10.1371/journal.pone.0229053

Fig 4. Measured dose beam profiles and percentage depth doses for all treatment arms.

Fig 4

(A-D) Figures display the percentage depth doses for each of the 20 Gy volume-averaged treatment arms. (E-H) Figures display the corresponding SFRT beam profiles for each of the 20 Gy volume-averaged treatment arms. Note that the 20GySFRT and 50GySFRT arms share the same SFRT collimator and thus the same relative dosimetry. The large non-uniformity of the peak doses in the SFRT radiation is due to the finite x-ray target size and the nondivergence of the SFRT collimator. However, the actual peak dose non-uniformity in the treated tumor (diameter of ~10mm) is within 10%.