Characterization of tumors of jaw: Additive value of contrast enhancement and dual-energy computed tomography

Table 4 Comparison of dual-energy computed tomography quantitative parameters between subgroups

Parameters	Amelo, mean ± SD	OKC, mean ± SD	CGCG, mean ± SD	Other JT, mean ± SD	1P value	2P value	3P value
Mean HU	122 ± 28.3	33 ± 12.4	151 ± 24.3	117 ± 37.9	0.007	< 0.001	0.616
IC	29 ± 9.3	7.2 ± 5.8	36.1 ± 6.8	24.8 ± 11.5	0.036	< 0.001	0.232
WC	1032.5 ± 13	1010 ± 11	1043 ± 11.6	1040 ± 11.4	0.036	0.044	0.056
NIC	0.35 ± 0.15	0.10 ± 0.1	0.59 ± 0.25	0.39 ± 0.24	0.011	0.007	0.501
WC (cystic)	997 ± 5.6	1020 ± 5	-	-	-	< 0.001	-

¹P value obtained on comparison between ameloblastomas and central giant cell granulomas.

²P value obtained when unilocular ameloblastomas were compared with odontogenic keratocysts.

³P value obtained when ameloblastomas were compared with other jaw tumors.

Mean HU is the mean computed tomography density expressed in Hounsfield units. IC is the Iodine concentration of solid enhancing component expressed in 100 μg/cm³. WC is the water concentration of solid enhancing component expressed in 1000 mg/cm³. NIC is the normalized iodine concentration calculated as a ratio. WC (cystic) is the water concentration of cystic component calculated only in cases of unilocular ameloblastomas and OKCs. Other jaw tumor are a subgroup of lesions excluding ameloblastoma, CGCG and OKCs. IC: Iodine concentration; WC: Water concentration; NIC: Normalized iodine concentration; OKC: Odontogenic keratocyst; JT: Jaw tumor; CGCG: Central giant cell granuloma.