Interplay between dose, dose rate and endpoint in the tissue sparing effect of FLASH radiotherapy.

Poulsen, Per Rugaard; Johansen, Jacob Graversen; Sørensen, Brita Singers · Radiother Oncol · 2026

basic_science · Level V

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Abstract

FLASH tissue sparing involves an interplay between dose, dose-rate and investigated endpoint. A risk zone map that divides the two-dimensional dose - dose-rate-space into different toxicity risk zones based on previous in-vivo data illustrates this interplay intuitively, including why FLASH sparing manifests at lower dose rates for severe compared to mild toxicity.

Medical subject headings