Enhancement patterns of pancreatic adenocarcinoma on conventional dynamic multi-detector row CT: Correlation with angiogenesis and fibrosis

Table 1 Absolute attenuation value (HU)

	Pre-contrast	Arterial phase	Pancreatic phase	Late phase
Pancreatic cancer
mean ± SD	41 ± 4	61 ± 13	80 ± 13	86 ± 11
Median	41	56	81	85
Range	32-48	41-93	60-104	64-106
Abdominal aorta
mean ± SD	45 ± 4	284 ± 50	185 ± 40	139 ± 21
Median	45	295	171	136
Range	38-51	205-409	127-307	107-208

Table 2 Relatively enhanced value (HU)

	Arterial phase	Pancreatic phase	Late phase
Pancreatic cancer
mean ± SD	20 ± 14	39 ± 15	45 ± 13
Median	19	38	43
Range	6-54	15-70	23-74
Abdominal aorta
mean ± SD	239 ± 51	140 ± 40	94 ± 22
Median	248	125	91
Range	157-365	86-269	69-171

Table 3 Tumor-aorta enhancement ratio

	Mean ± SD	Median	Range
Tumor-aorta enhancement ratio (arterial)	0.835 ± 0.053	0.066	0.029-0.216
Tumor-aorta enhancement ratio (pancreatic)	0.291 ± 0.12	0.244	0.139-0.569
Tumor-aorta enhancement ratio (late)	0.487 ± 0.129	0.483	0.295-0.816