不同性质甲状腺结节超声、CT影像表现及诊断价值对比研究

Comparative Study on Ultrasonographic and CT Findings of Thyroid Nodule with Different Properties and Corresponding Diagnostic Value

目的对比分析不同性质甲状腺结节超声、CT影像表现及诊断价值。方法回顾性分析60例甲状腺结节患者的临床资料,分析其影像学特征,对比超声、CT检查诊断甲状腺结节的敏感性、特异性及准确性。结果共62例甲状腺结节,其中良性39例,恶性21例。CT检查诊断甲状腺结节的敏感性、特异性及准确性分别为94.87%、80.95%、90.33%,高于超声检查的79.49%、76.19%、78.33%(P<0.05)。良性甲状腺结节CT表现为结节形态规则、边缘清楚,可见明显钙化,增强扫描后边界更为清晰。超声可显示纯囊性结节,呈高回声;内部血流信号呈点状分布,多于正常组织。恶性甲状腺结节CT示结节形态多不规则、边缘模糊,可伴淋巴结转移。超声可见实性低回声结节,形态、边缘不规则,内部回声不均匀,内部血流信号丰富。结论CT、超声均可有效显示甲状腺结节的影像学特点,在鉴别良恶性甲状腺结节上具有较高的临床价值;超声可作为首选检查,CT可作为补充检查。

Objective To compare and analyze the imaging manifestations of different types of thyroid nodules in ultrasound and CT and their diagnostic value.Methods The clinical data of 60 patients with thyroid nodules were analyzed retrospectively.The imaging characteristics were analyzed,and the sensitivity,specificity and accuracy between ultrasound and CT in the diagnosis of thyroid nodules were compared.Results There were 62 cases with thyroid nodules,39 cases were benign and 21 cases were malignant.The sensitivity,specificity and accuracy of CT examination in the diagnosis of thyroid nodules were 94.87%,80.95%,and 90.33%,respectively,which were higher than those of ultrasound examination,79.49%,76.19%,and 78.33%,and the sensitivity was the highest(P<0.05).CT examination of benign thyroid nodules showed regular shapes,clear edges,and obvious calcification.The boundary was clearer after enhanced scanning.Ultrasound showed pure cystic nodules,which were hyperechoic.The internal blood flow signal was distributed as dots,more than that of normal tissues.CT of malignant thyroid nodules showed irregular shapes,blurred edges,and lymph node metastasis.Ultrasound showed solid hypoechoic nodules with irregular shapes and edges.The internal echo was uneven and the internal blood flow signal was abundant.Conclusion CT and ultrasound can effectively display the imaging characteristics of thyroid nodules,which have high clinical value in differentiating benign from malignant thyroid nodules.Ultrasound can be used as the first choice,CT can be used as a supplementary examination.