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Dose Rate Definitions
Definitions vary across organisation (ICRU and AAPM) but
generally:
LDR 0.5 to 1 Gy per hour
MDR 1 to 12 Gy per hour
HDR > 12 Gy per hour but is usually as high as 2 to 5 Gy per
minute
Pulsed dose rate delivers large number of fractions with short
intervals between and aims to have similar effect as LDR