Fig. 2.

Kinetics for γ-H2AX foci loss in lymphocytes from individuals after a CT scan. Blood samples were taken immediately before (control) or at the indicated times after CT, and foci numbers were determined. (Upper) Data represent the unmodified results for 14 individuals covering a range of DLP values from 150 to 1,500 mGy·cm. (Lower) Data were derived by background subtraction and normalization to a DLP of 1,000 mGy·cm. The data at 30 min and 1 h, except those of patient HOM-85, are part of the larger data set shown in Fig. 1. Error bars indicate SEM.