网页2012年7月14日 · Radiation Risk: Summary. very difficult estimate true effective dose (mSv) from CT exposure parameters (CTDI, DPL) Radiation has deterministic effects at high doses (>250mSv), CT doses are in the low dose range (<100mSv), typically 1–50 mSv, which has stochastic effects (i.e. cancer, on population basis), with wide error margins of estimates.