Pediatric Terrorism and Disaster Preparedness: Table 6.1

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Class of Biomarker	Assay	Time Window	Operating Dose Window (Gy, acute photon-equivalent)
Prodromal signs and symptoms	Onset of vomiting	<12 hr	2–20
Hematological	Depletion of peripheral blood lymphocytes	<1.5 wk	2–8
Cytological	Lymphocyte-metaphase spread dicentric	< several months^a	0.2–5
Cytological	Lymphocyte-premature chromosome condensation	<several months^a	0.2–20

^a Generally, blood is sampled 24 hours after radiation exposure for cytological chromosome aberration analysis of dose.