Diagnostic Value of Spectral CT in Lymph Node Metastasis in Gastric Cancer and Analysis of Influencing Factors

doi:10.7517/issn.1674-0475.220705

Abstract

Abstract: This study investigated the value of spectral CT in the diagnosis of lymph node metastasis in patients with gastric cancer and its influencing factors. Selected 87 gastric cancer patients with lymph node metastasis as the metastasis group, and 90 gastric cancer patients without lymph node metastasis as the control group. All patients received energy spectral CT scan before, and the related parameters of energy spectral CT were compared between the two groups, and the receiver operating characteristic (ROC) curve was drawn to analyze the value of each parameter in the diagnosis of lymph node metastasis in gastric cancer. The related factors affecting the accuracy of spectral CT in preoperative diagnosis of lymph node metastasis in gastric cancer was analyzed. The results showed that the ratio of the length and diameter of lymph nodes, the IC in the arterial phase, the IC in the venous phase, the nIC in the arterial phase, and the nIC in the venous phase in the metastatic group were significantly higher than those in the non-metastatic group (P<0.05). The AUC values of lymph node length and diameter ratio, arterial phase IC, venous phase IC, arterial phase nIC, and venous phase nIC values for the diagnosis of lymph node metastasis in patients with gastric cancer were 0.809, 0.669, 0.734, 0.769 and 0.778,respectively. Logistic model results showed that: rough fat around the lesion, TNM stage ≤ stage Ⅱ, and tumor invasion depth not reaching the submucosa were the influencing factors for the accurate diagnosis of lymph node metastasis in patients with gastric cancer before energy spectrum CT (P<0.05). Spectral CT parameters can more accurately determine whether lymph node metastases occur in gastric cancer patients before surgery, and have certain value for the treatment and prognosis evaluation of patients.

Key words: spectral CT, diagnosis, gastric cancer, lymph node metastasis, influencing factors

LI Haoran, ZHANG Peng, CHEN Chong. Diagnostic Value of Spectral CT in Lymph Node Metastasis in Gastric Cancer and Analysis of Influencing Factors[J]. IMAGING SCIENCE AND PHOTOCHEMISTRY, 2022, 40(6): 1390-1395.

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