Equation of Azizova et al for Correlating the Absolute Neutrophil Count Within a Few Hours After an Exposure and the Radiation Dose

The neutrophil count tends to increase within a few hours of a radiation exposure, A neutrophilia > 12,000 per µL correlates with severity group IV. Group IV patients tend to show a bimodal pattern over the first week. Neutropenia may develop in Group III or IV about a week after the exposure.

Parameters:

(1) absolute neutrophil count within 2-3 hours after a radiation exposure

(2) acute radiation dose in Gy

absolute neutrophil count in 10^9/L =

= 4.94 + (4.66 * LOG10(absorbed dose in Gy))

If this is rearranged:

absorbed dose in Gy =

= 10^((absolute neutrohil count in 10^9/L) - 4.94) / 4.66) =

= 10^((0.215 * (absolute neutrophil count)) - 1.06)