Table 3.

1st order statistics describing the distribution of individual pixel values in lung slice images derived from CT scan images of radio-exposed (Rx) and contralateral control (CON) lung at time points prior to (d-21), and following radiation exposure (d21, and d171/227).

Sheep	Lung	Timepoint (d)	Area (mm2)	HU mean	HU SD	HU min	HU max	Skewness	Kurtosis
ED980	CON	− 21	1833	− 490	131	− 952	229	0.68	1.63
		21	1906	− 499	183	− 980	207	0.59	− 0.05
		227	2102	− 516	231	− 1003	233	0.69	− 0.25
	Rx	− 21	1843	− 503	133	− 815	51	0.70	0.43
		21	1955	− 378	229	− 850	164	0.19	− 1.27
		227	1858	− 605	158	− 919	420	2.06	5.43
ED982	CON	− 21	2739	− 693	79	− 1023	− 132	1.57	6.45
		21	1583	− 436	136	− 828	205	0.66	0.73
		227	1579	− 465	255	− 1020	266	0.69	− 0.51
	Rx	− 21	2450	− 642	104	− 1024	189	1.36	4.95
		21	1496	− 239	164	− 871	174	− 0.49	− 0.38
		227	1775	− 579	128	− 894	642	1.51	6.41
ED983	CON	− 21	1765	− 564	109	− 935	27	0.52	0.84
		21	1946	− 652	88	− 932	18	0.54	1.90
		171	1492	− 475	114	− 849	28	0.31	0.31
	Rx	− 21	1752	− 588	106	− 916	105	0.85	2.48
		21	1873	− 529	144	− 961	88	0.28	− 0.04
		171	1441	− 634	132	− 956	225	1.26	3.96
ED984	CON	− 21	1747	− 713	96	− 1004	− 198	0.56	1.47
		21	1607	− 659	98	− 945	− 50	0.69	1.98
		171	1442	− 574	198	− 988	558	1.55	3.00
	Rx	− 21	1817	− 681	123	− 1007	− 25	0.69	0.67
		21	1872	− 531	155	− 909	165	0.57	0.25
		171	1698	− 687	109	− 1018	− 50	0.50	0.85