3.

转移性淋巴结与肺转移性淋巴结GSI定量参数的比较

Difference of GSI quantitative parameters between benign and metastatic lymph nodes

Parameter	Benign lymph nodes	Metastatic lymph nodes	P value
AP: arterial phase; VP: venous phase; λHU: The slope of the Hounsfieldunit curve; NIC: normalized iodine concentration values; WC: water concentration values；GSI: gemstone spectral imaging; data are mean values±standard deviations; P < 0.05 indicates a statistically significant difference.
Size	0.77±0.24	1.13±0.24	< 0.001
AP CT value	70.0±17.4	106.2±19.1	< 0.001
AP λHU	2.1±0.5	3.6±0.9	< 0.001
AP NIC	0.16±0.05	0.22±0.05	< 0.001
AP WC	1, 024.9±15.5	1, 030.1±10.8	0.105
VP CT value	69.5±16.5	85.5±15.9	< 0.001
VP λHU	2.3±0.6	2.7±0.8	0.005
VP NIC	0.49±0.12	0.57±0.14	0.009
VP WC	1, 022.1±14.7	1, 022.8±11.3	0.800