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Repeated measurements of a small area in rapid succession highlight the time dependence of radiation-induced damage. Using the K signal as a proxy for mass loss, we see that after three repeated images of 852 Gy separated by 10 min and an additional 1 min, approx. 95 % of the total K is present, with similar results observed for a dose of 2.13 kGy (A). However, increasing the imaging dose to 8.52 kGy results in significant (>15 %) loss in the K signal after 10 min (B and C).
