Dual-energy spectral CT characteristics in surgically resected lung adenocarcinoma: comparison between Kirsten rat sarcoma viral oncogene mutations and epidermal growth factor receptor mutations

Table 2 Association of CT texture type and DESCT features

Characteristics	Total	SN	SSN	P value
No. of patients	72	56	16
DESCT quantitative parameter
CT number at 70 keV^a	−5.25 ± 139.64	47.39 ± 23.04	− 189.49 ± 209.28	0.000
Slope λ HU^a	1.95 ± 1.03	1.71 ± 0.92	2.78 ± 0.98	0.000
NIC^a	0.22 ± 0.12	0.19 ± 0.12	0.28 ± 0.11	0.004
NWC^a	0.93 ± 0.14	0.99 ± 0.02	0.74 ± 0.19	0.000
Effective Z^a	8.06 ± 1.82	8.45 ± 0.43	6.69 ± 3.53	0.866

Note. Values are mean ± standard deviation or number
^aQuantitative data did not exhibit normal distribution and Mann-Whitney U test was applied
P < 0.05 indicates significant difference; Significant P values are in bold
SN solid nodule, SSN Subsolid nodule, NIC Normalized iodine concentration, NWC Normalized water concentration, Slope λ HU the slope of the spectral Hounsfield unit curve, Effective Z effective atomic number

ISSN: 1470-7330