<prompt> Acute radiation hepatic damage is most marked between-1-7 days7-21 days21-40 days40-100 days  <response>: Acute radiation damage normally affects rapidly proliferating tissue : -Hematopoietic tissue Latent period 2-3 weeks.Epithelium of GIT Latent period 3-5 days.Lymphoid tissueAcute radiation damage also affects the CNS Latent period 15 minutes to 3 hours.Hepatic radiation damage is not acute, it is subacute and appears within 90 days. 