Diagnosis of CT Spectrum Curve Combined with Morphology in Central Lymph Node Metastasis of Papillary Thyroid Carcinoma
10.3969/j.issn.1005-5185.2017.07.003
- VernacularTitle:CT能谱曲线结合形态学诊断甲状腺乳头状癌中央组淋巴结转移的价值
- Author:
Yiren JIN
;
Dan HAN
;
Dong ZHENG
;
Yue JIANG
;
Wei ZHAO
- Keywords:
Thyroid neoplasms;
Carcinoma,papillary;
Tomography,X-ray computed;
Lymphatic metastasis;
Pathology,surgical
- From:
Chinese Journal of Medical Imaging
2017;25(7):491-495
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To investigate the diagnostic value of dual energy CT spectrum curve combined with CT morphology in central lymph node metastasis of papillary thyroid carcinoma (PTC).Materials and Methods Thirty-one PTC patients who accepted dual energy CT double-phase enhanced scan before surgery were analyzed.Central lymph nodes with short diameter ＞ 5 mm were labelled using axial plus 3D positioning.Preoperative labelled lymph nodes were collected and marked during operation.The CT morphology of metastatic lymph nodes was analyzed.The spectrum curve slope (K) difference between metastatic and non-metastatic lymph nodes of arterial-phase and venous-phase primary lesion was compared.The critical K value and the diagnostic efficacy of K value combined with morphology were obtained according to receiver operating characteristic (ROC) curve.Results A total of 73 central lymph nodes were obtained from 31 patients,among which 51 were metastatic and 22 were non-metastatic.There was no significant difference in K value between metastatic and non-metastatic lymph nodes of arterial phase group (P＞0.05).While,there was a significant difference in K value between metastatic and non-metastatic lymph nodes of venous phase group (P＜0.05).For venous phase,the sensitivity and specificity of the K value in diagnosing central lymph node metastasis were 62.7％ and 59.1％,respectively,and combined with morphology,the sensitivity and specificity reached 76.5％ and 81.8％,respectively.Conclusion The K value of CT spectrum curve is of certain significance in predicting PTC central lymph node metastasis,and the K value combined with CT morphology can improve the accuracy of diagnosis.
