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| Clinical value of dual-energy CT combined with color Doppler ultrasound for diagnosing the cervical cancer lymph node metastasis of patients |
| The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong Province, 510150 |
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Abstract To explore the diagnostic value of dual-energy CT parameters combined with color Doppler ultrasound for the cervical cancer pelvic lymph node metastasis of patients. Methods: The clinical data of 155 patients with cervical cancer who had been confirmed from June 2019 to June 2022 were selected and were divided into group A (108 cases without metastasis) and group B (47 cases with metastasis) according to the situation of pelvic lymph node metastasis. The dualenergy CT parameters and the color Doppler ultrasonography performance characteristics of the patients in the two groups were analyzed, and the diagnostic efficacy of the dual-energy CT parameters combined with color Doppler ultrasonography characteristics for the pelvic lymph node metastasis of cervical cancer of the patients was evaluated. Results: Among the 47 patients in group B, 41 (87.2%) patients were diagnosed with lymph node metastasis of cervical cancer by color ultrasound, which showed the irregular circular or abnormal fused shape, the internal uniform low echo, the abundant blood flow signals of dot and stripe, and the low RI value. Among the 108 patients in group A, 86 (79.6%) patients were not diagnosed with lymph node metastasis by color ultrasonography, which showed the no obvious space occupying lesions, the isoecho or slightly hypoecho of internal echo, no rich of the blood flow was, and the high RI value. In 155 cases of cervical cancer, the internal CT manifestations of lesions were the low echo, the uneven, the most edges with irregular, some of them with calcification foci, the round or oval lymph nodes, the blurred edges, the obvious enhancement, and the low density in center. The values of the quantitative parameters in arterial and venous phases by dual-energy CT, such as λHU, NIC, and IC of the patients in group B were significantly higher than those of the patients in group A (P＜0.05). The area under the curve (AUC) of the values of λHU, NIC, and IC in arterial phase for diagnosing the lymph node metastasis of cervical cancer of the patients were 0.831, 0.818, and 0.836, respectively, which were slightly higher than those (0.800, 0.772, and 0.721, respectively) in venous phase. The AUC, the sensitivity, and the specificity of the values of color ultrasound performance characteristics of the patients for diagnosing their lymph node metastasis were 0.834, 87.2%, and 79.6%, respectively. The AUC, the sensitivity, and the specificity of the values of λHU, NIC, and IC in arterial stage combined with the color ultrasound performance characteristics of the patients for diagnosing their lymph node metastasis of cervical cancer were 0.963, 93.6%, and 89.8%, respectively, and the diagnostic efficacy of the values of λHU, NIC, and IC in arterial stage combined with the color ultrasound performance characteristics of the patients for diagnosing their lymph node metastasis of cervical cancer was significantly higher than that of the λHU value, the NIC, or the IC value in arterial stage, or the color ultrasound performance characteristics alone (P＜0.05). Conclusion: The values of dual-energy CT parameters in arterial stage combined with color Doppler ultrasound performance characteristics of the patients have high diagnostic value for their cervical cancer pelvic lymph node metastasis.
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