ABSTRACT
Objective To explore the value of gemstone spectral imaging (GSI) with single source dual-energy CT in characterizing the benign and malignant solitary pulmonary nodules (SPN).Methods Totally 32 patients with SPN underwent phaseⅢ enhanced CT scan using single source dual-energy CT by GSI mode.Three types of images were reconstructed for analysis:the water concentration (WC),iodine concentration (IC) and normalized iodine concentration (NIC).Results The IC of lung squamous cell carcinoma lung adenocarcinoma,hamartoma,sclerosing hemangioma,inflammatory pseudotumor were (11.66± 2.72) μg/ml,(12.36±2.97) μg/ml,(10.20±3.11) μg/ml,(16.58±3.58) μg/ml,(21.67±3.76) μg/ml,the IC of lung adenocarcinoma and lung squamous cell carcinoma had no difference (P ＞ 0.05),there were significant differences in the value of iodine material between other nodules (all P ＜ 0.05).The WC of lung adenocarcinoma,lung squamous cell carcinoma,hamartoma,sclerosing hemangioma,inflammatory pseudotumor were (1 021.31±13.83) μg/ml,(1 027.98±12.53) μg/ml,(1 003.42±13.67) μg/ml,(1 029.61±12.06) μg/ml,(1 051.61±13.81) μg/ml,there was no significant difference in the value of water material between nodules (all P ＞ 0.05).Conclusion The spectral CT imaging may be helpful for characterizing the pathological type of SPN.