Table 1. Comparison of biodosimetry method properties.

Method	Dose Range (Gy)	Time before sample can be taken	Time to dose estimate	Time period when assay will give results
Dicentric Chromosome	0.1–5	Immediately	55 + h	3–6+ mo
Assay	0.5–5 (triage)		52+ h
Cytokinesis Block Micronucleus	0.3–5	Immediately	3+ d	6 mo –1 y
γ–H2AX		Immediately		24–48 h
Microscope	0.5–5		4–6 h
FACS	0.5–10		2 h
Lymphocyte Depletion Kinetics Assay	0.5/1–10	Immediately for baseline, time needed for depletion to occur	<1 h per test. Serial testing requires 8-48 h.	12 h– 7 d
Premature Chromosome Condensation	0.2–20	Immediately	CHO fusion: 2–3 h Chemical stimulation: 51 h	At least 1 wk, likely 6+ mo
Gene Expression	0.1–5	Immediately, depending on when gene is upregulated	9–36 h	Through 48–72 h
EPR (tooth)	1–30	Immediately	5–25 min	Lifetime and longer