Table 1.

Yield and distribution of “dicentric + ring”, following ex vivo irradiation of 0–5 Gy (6 MeV, X-ray). All sets of data were in agreement with Poisson distribution (u values were within the range of ±1.96) and were fitted by a linear quadratic model (Y C + αD + βD²) using Dose Estimate software, version 5.2. D0, D1, D2, D3, D4, D5, D6 and D7, represents metaphases with 0, 1, 2, 3, 4, 5, 6 and 7 “dicentric + ring”, respectively.

Dose (Gy)	Cells Scored	D + R (No)	Distribution of “Dicentric + ring”								Yield (Y)	Relative Variance σ2/Y	Dispersion Index (u)	Poisson Distribution
			D0	D1	D2	D3	D4	D5	D6	D7
0	12654	6	12648	6	0	0	0	0	0	0	0.0005	1.000	−0.034	P
0.1	2500	6	2494	6	0	0	0	0	0	0	0.0024	0.998	−0.077	P
0.25	2000	11	1989	11	0	0	0	0	0	0	0.0055	0.995	−0.166	P
0.5	2000	37	1963	37	0	0	0	0	0	0	0.0185	0.982	−0.577	P
0.75	2000	55	1946	53	1	0	0	0	0	0	0.0275	1.009	0.299	P
1	2000	122	1884	111	4	1	0	0	0	0	0.0610	1.054	1.723	P
2	700	145	569	118	12	1	0	0	0	0	0.2071	1.001	0.022	P
3	450	297	236	155	41	12	6	0	0	0	0.6600	1.103	1.552	P
4	450	399	185	175	61	18	8	2	1	0	0.8867	1.108	1.624	P
5	350	588	28	189	56	46	15	9	5	2	1.6800	0.993	−0.094	P