Clinical Value of CT Energy Spectrum Imaging Technology on Evaluating Preoperative Lymph Node Metastasis around Colorectal Cancer Lesions
Objective To explore the clinical value of CT energy spectrum imaging technology on the evaluation of preoperative lymph node metastasis around colorectal cancer(CRC)lesions.Methods 104 patients with CRC who underwent CT examination in imaging department and were confirmed by pathology were selected between May 2021 and May 2023.131 lymph nodes were included in the examination,including 79 metastatic lymph nodes and 52 non-metastatic lymph nodes.CT energy spectrum imaging technology was used for scanning analysis,and energy spectrum parameters such as short diameter,morphological difference,iodine concentration(IC),normalized iodine concentration(NIC)and slope(λHU)of arterial phase and venous phase were compared between the two types of lymph nodes,and receiver operating characteristic(ROC)curve was drawn to evaluate the diagnostic efficiency of CT energy spectrum parameters on lymph node metastasis.Results The axial,sagittal and coronal short diameters of metastatic lymph nodes around CRC lesions were longer than those of non-metastatic lymph nodes(P＜0.05).The proportions of blurred margin,aggregation and uneven enhancement of metastatic lymph nodes were higher than those of non-metastatic lymph nodes(P＜0.05).The IC,NIC and λHU of arterial phase and venous phase of metastatic lymph nodes were lower than those of non-metastatic lymph nodes(P＜0.05).According to ROC curve analysis,CT energy spectrum imaging parameters had certain application value in the diagnosis of lymph node metastasis(P＜0.05).The diagnostic efficiency of IC and NIC in arterial phase and NIC in venous phase was the highest,with AUCs of 0.894,0.895 and 0.892,sensitivities of 91.14％,86.08％and 93.67％and specificities of 73.08％,82.69％and 76.92％respectively.Conclusion CT energy spectrum imaging can distinguish the short diameter and morphological difference between non-metastatic lymph nodes and metastatic lymph nodes,and CT energy spectrum parameters can accurately judge the preoperative lymph node metastasis around lesions in patients with CRC.
CT Energy Spectrum Imaging Round Colorectal Cancer LesionsColorectal CancerPreoperative Lymph Node MetastasisClinical value
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维普
