. 2007 Apr 20;5(2):94–122. doi: 10.2203/dose-response.06-013.Scott

TABLE 3.

Central estimates of thresholds, median effective, and median lethal absorbed radiation doses for Po-210 alpha-radiation-induced deterministic effects after high-rate exposure at early times after radionuclide intake.

Symptom or Mode of Death	Region for Dose Evaluation	Threshold (Gy)^a	Median Effective or Median Lethal Absorbed Radiation Dose (Gy)^a
Vomiting	Stomach wall	0.25 (0.17,0.5)^b	1
Diarrhea	Stomach wall	0.5 (0.33,1.0)^b	1.5
Hematopoietic mode of death	Bone marrow	0.51 (0.34,1.0)^b	1.5

^aBased on RBE_α = 2.

^bLower and upper bounds based on lower and upper bounds for RBE_α of 2 and 3.