常规超声、超声造影、剪切波弹性成像超声在甲状腺结节良恶性鉴别诊断中的应用价值

目的:研究常规超声、超声造影、剪切波弹性成像超声在甲状腺结节良恶性鉴别诊断中的应用价值.方法:选取我院2012年9月～2015年12月收治的甲状腺结节患者45例为研究对象,所有患者均接受常规超声、超声造影与剪切波弹性成像超声检查,并且将病理结果作为对照,对不同超声检查方式的诊断结果进行分析.结果:在甲状腺结节良恶性鉴别诊断中,常规超声、超声造影、剪切波弹性成像超声均具备有诊断价值,相对于其它诊断方式,剪切波弹性成像与病理诊断具有最高的诊断符合率,Kappa值高达0.578;常规超声+剪切波弹性成像在断甲状腺结节良恶性诊断上的特异性最高,为85.8％.结论:剪切波弹性成像诊断甲状腺结节良恶性的效果显著;联合应用剪切波弹性成像超声与常规超声,能够将诊断价值进一步增强.     

超声弹性成像联合超声造影在甲状腺良恶性结节鉴别诊断中的临床价值

目的 探讨超声弹性成像联合超声造影在甲状腺良恶性结节鉴别诊断中的临床价值.方法 将收治的甲状腺结节性病变患者49例作为研究对象,全部患者均实施常规超声检查、彩色多普勒血流成像检查以及超声造影检查,将病理学诊断作为金标准,统计并对比常规超声和超声弹性成像联合超声造影的临床诊断结果.结果 超声弹性成像联合超声造影检查诊断甲状腺良恶性结节的敏感度、特异性、阳性预测值、阴性预测值以及诊断符合率均要显著高于常规超声检查(P＜0.05).结论 在甲状腺良恶性结节鉴别诊断中应用超声弹性成像联合超声造影检查具有较高临床价值,能够显著提高鉴别诊断的准确性与特异性.     

实时超声弹性成像对良恶性甲状腺结节的鉴别

目的:探讨实时超声弹性成像对良恶性甲状腺结节的鉴别价值。方法 :收集我院2011年2月至2014年2月98例甲状腺结节患者(112个甲状腺结节)的临床及影像资料,比较超声弹性成像与常规彩超诊断的准确性、特异性、敏感性等指标。结果:112个甲状腺结节中,79个为良性病变,其中52个为结节性甲状腺肿,22个为甲状腺腺瘤,5个为其他;33个为恶性病变,其中26个为乳头状腺癌,3个为髓样癌,2个为滤泡性腺癌,2个为未分化癌。常规彩超对良、恶性甲状腺结节的诊断准确度分别为64.56%、72.73%,实时超声弹性成像对良、恶性的诊断准确度分别为83.54%、90.91%,2种检测方法差异有统计学意义(P0.05)。结论:实时超声弹性成像在良恶性甲状腺结节的诊断及鉴别诊断中具有较高的临床应用价值,值得大力推广。     

探讨超声弹性成像对甲状腺良恶性结节鉴别诊断的应用价值

目的:研究超声弹性成像在鉴别甲状腺良、恶性结节临床诊断中的应用价值。方法:对术前52例(93个)甲状腺结节进行常规二维、彩色多普勒超声及弹性成像检查,对弹性成像进行分析,并与病理结果进行对照。结果:93个甲状腺结节中,良性结节64个,恶性结节29个。其良性结节中,47个结节评为1～2分,恶性结节中,27个结节评为4～5分,两组弹性成像评分比较有统计学差异(P<0.01)。其诊断恶性结节的敏感性87.10%、特异性96.77%、准确性93.55%。结论:超声弹性成像对鉴别甲状腺良恶性病变提供很大的帮助。     

超声弹性成像在甲状腺良、恶性结节鉴别诊断中的应用价值

随着高频超声在临床应用的不断深入,大量无临床症状的甲状腺结节被检出;尽管超声对甲状腺结节的诊断敏感性很高,但在甲状腺结节良、恶性鉴别诊断方面的效果却不十分理想。近年来出现的超声弹性成像技术通过检测组织间的硬度差别来反映病变本身的生物特性,为鉴别甲状腺良、恶性结节提     

弹性成像比值法与萤火虫联合应用在鉴别甲状腺良恶性结节中的价值

目的应用弹性成像（ultrasonic elastography,UE）应变比值法（Strain ratio,SR）与萤火虫成像（Micropure）联合应用鉴别甲状腺良恶性结节,及与其它方法相比较,探讨其在发现甲状腺恶性结节中的价值。方法回顾性分析甲状腺结节210例常规超声,Micropure和UE检查,并与患者手术后病理结果相对照。绘制SR值在诊断甲状腺恶性结节的受试者工作特性曲线（receiver operator characteristic curve,ROC）,确定最佳诊断界值。计算出三种检查方法中的单一指标和较有意义的几个联合指标在诊断甲状腺恶性结节中的灵敏度、特异度、阳性预测值（PPV）、阴性预测值（NPV）。比较各组间的差异,Pd0．05差异有统计学意义。结果UE比值法与Micropure联合在诊断甲状腺恶性结节中的灵敏度、特异度最高,分别为93．1％、95．6％。结论UE比值法与Micropure联合应用在甲状腺恶性结节的诊断中具有一定价值。     

彩色多普勒超声联合弹性超声成像诊断甲状腺良恶性结节的临床作用

目的:探讨彩色多普勒超声与弹性超声成像在甲状腺良恶性结节诊断中的应用。方法:选取门诊、住院接诊的80例甲状腺结节患者作为本次研究对象。所有患者均先采用彩色多普勒超声检测,再进行弹性超声成像检测,观察2组良、恶性结节诊断结果、超声资料、甲状腺结节成像结果。结果:通过对80例甲状腺结节患者的检测,弹性超声组检查形态规则、边界清晰情况人数检查较准确,有晕环、微小钙化、血流信号丰富情况较小,多普勒超声检查形态规则、边界清晰情况人数较模糊,有晕环、微小钙化、血流信号丰富情况较高,上述检出率均明显高于多普勒超声组(P<0.05)。甲状腺结节弹性超声成像评分恶性结节4~5分明显高于良性结节(P<0.05)。结论:彩色多普勒超声在弹性超声成像的铺助下,能够准确的获取结节内部组织信息,准确判断良、恶性结节,弥补彩色多普勒超声的不足。     

超声弹性成像诊断甲状腺结节的价值

目的: 探讨超声弹性成像诊断甲状腺结节性疾病的价值.材料和方法: 分析68例共116个甲状腺结节的纵、横切面超声弹性图,按弹性硬度将其分为5级,以0～II级作为判断甲状腺良性结节的诊断标准,III～IV级作为判断甲状腺恶性结节的诊断标准,并与病理结果对照.结果: 超声弹性图纵切面的诊断敏感性为100%,特异性为73.3%,准确性为76.8%;横切面的诊断敏感性为100%,特异性为72.3%,准确性为75.9%.纵、横切面鉴别甲状腺良、恶性结节的差异无统计学意义(P＞0.05).结论: 超声弹性成像对甲状腺结节的诊断有较大的应用价值,综合常规超声表现有助于提高诊断的信心.     

超声弹性成像与常规超声检查甲状腺结节的临床价值分析

目的：探讨超声弹性成像对常规超声可疑恶性甲状腺结节的鉴别诊断作用。方法对常规超声与超声弹性成像对可疑恶性甲状腺结节的鉴别诊断。结果本组32例患者均经手术病理证实,其中甲状腺乳头状癌21例,甲状腺腺瘤9例,甲状腺滤泡癌2例。32例患者均为单发实性低回声病灶,其中13例患者的病灶内可见点状钙化,1例患者伴有粗大钙化,10例患者的二维超声显示边缘不规则,11例周边存在声晕;彩色能量多普勒超声显示血流丰富程度为：血流Ⅱ型21例,Ⅲ型11例。以低回声、点状钙化、存在声晕、C PD血流丰富作为恶性提示指标,研究结果显示常规二维和C PD检查为恶性21例,其中与手术病理诊断一致17例;经统计,常规二维和C PD联合检查的灵敏性为73．91％,特异性为55．56％,准确性为68．75％。结论超声弹性成像是一种无创评价组织弹性的显像方式,对经常规超声检查可疑恶性的甲状腺单发实性小结节的进一步鉴别诊断有很大的帮助。     

甲状腺结节的常规超声、弹性成像与病理诊断比较

目的探讨常规超声联合弹性成像对判断甲状腺良、恶性结节的诊断价值。方法 55例72个经手术病理证实的甲状腺结节进行常规超声检查、弹性成像并与术后病理图像进行对照分析。结果良、恶性组间在结节的形态、回声、微钙化、纵横比及弹性评分存在统计学差异(P<0.05)。常规超声与弹性成像联合应用符合率有一定程度提高,达到93.1%。结论甲状腺结节的常规超声联合弹性成像对于甲状腺良、恶性结节的判断具有较大的诊断意义。     

Efficacy of thyroid ultrasound elastography in differential diagnosis of small thyroid nodules

Objective

To explore the efficacy of thyroid ultrasound (US) elastography in differential diagnosis of small thyroid nodules.

Methods

This HIPAA-compliant study was approved by the Institutional Review Board and all patients provided written informed consent. Thirty-five patients with 38 small thyroid nodules as seen on transverse ultrasound image formed our study population. An US examination and a separate thyroid elastography examination with pulsation from the carotid artery used as the compression source were performed before fine-needle aspiration. Baseband US data were acquired for off-line elastography processing, where a semi-quantitative index for each nodule was calculated. The Kruskal–Wallis nonparametric rank sum test was used to assess equality of population means among the different types of thyroid nodules. Maximum likelihood estimation of the curve parameters for a binomial receiver operating characteristic (ROC) curve was performed.

Results

Elasticity contrast index calculated with elastography was effective in distinguishing between small papillary thyroid carcinomas (PTMC, n = 8) and other lesions (n = 30) in small thyroid nodules (p = 0.0036). The area under the ROC curve for diagnosing PTMCs was 0.812 with a 95% confidence interval of 0.653–0.920. The cut-off value of ECI of 3.6 led to a sensitivity of 100% and a specificity of 60% for detecting PTMCs.

Conclusion

Noninvasive evaluation of small thyroid nodules is possible using thyroid US elastography with in vivo compression to pick out the most suspicious thyroid nodules for fine-needle aspiration (FNA) and avoid FNA in benign nodules.     

剪切波弹性成像对甲状腺良恶性结节的诊断价值

目的:探讨超声剪切波弹性成像(SWE)对甲状腺良恶性结节的诊断价值.方法:收集104例(126个结节)甲状腺结节为研究对象,采用常规超声检查结节的回声、边缘、内部钙化程度、组成及形状;采用CDFI评估结节血流;采用SWE定性和定量评估结节弹性,获取剪切波速度(SWV),并通过ROC曲线计算SWV的最佳临界值.以最大SW...     

二维及彩色多普勒超声鉴别甲状腺结节良恶性的Logistic回归分析

目的:探讨二维及彩色多普勒超声声像图特征的Logistic回归模型分析对甲状腺结节良恶性鉴别诊断的意义。方法:选取经病理确诊的124个甲状腺结节,总结其二维及彩色多普勒声像图特征,建立Logistic回归模型并进行分析。结果:二分类Logistic回归模型分析共选出4项较敏感声像图特征,分别是微钙化、声晕、内部回声及血流分布。结论:二分类Logistic回归模型分析能筛选出对甲状腺结节良恶性鉴别有意义的二维及彩色多普勒超声声像图指标,对甲状腺结节良恶性鉴别有重要价值。     

Comparison analysis between conventional ultrasonography and ultrasound elastography of thyroid nodules

Objective

To compare the effectiveness of conventional ultrasonography and ultrasound elastography in differential diagnosis of thyroid nodular diseases.

Methods

244 patients with 291 thyroid nodules were examined by ultrasonography and ultrasound elastography respectively; the examination results were compared against pathological findings to determine the effectiveness of these two examination methods.

Results

The sensitivity and positive predictive value of conventional ultrasonography is higher than those of ultrasound elastography, but its specificity, accuracy, and negative predictive value is lower than those of the later.

Conclusions

Ultrasound elastography is superior to conventional ultrasonography in differential diagnosis of thyroid nodules. However, ultrasonography is the basis of examination; only on this basis, an additional ultrasound elastography examination could greatly improve the diagnostic rate of thyroid nodular diseases.     

The clinical value of ultrasound elastography in predicting malignant thyroid nodules

Objective

This study aims to evaluate the clinical value of ultrasound elastography (USE) in providing information on the nature of the thyroid nodules. This was performed using the elastography score and strain ratio in differentiating thyroid benign and malignant nodules and the histopathological examination was used as the diagnostic standard of reference.

Methods

We examined 84 thyroid nodules in 62 patients with ultrasound elastography. Elastography score was assigned based on a four-point scale according to the classification proposed by Itoh et al. with a score of 1 (low stiffness over the entire nodule) to a score of 4 (high stiffness over the entire nodule). Thyroid strain ratio (normal tissue to lesion strain ratio) was calculated. Histopathological results were the standard reference. The area under the curve (AUC) and the best cut-off point were both obtained using receiver-operating characteristic (ROC) curve analysis. The sensitivity, specificity, and accuracy of both techniques were calculated.

Results

Fifty-four of the 84 nodules had scores of 1 and 2, and 50 of these nodules were diagnosed histopathologically as benign. Thirty of the 84 nodules had a score of 3 and 4, and 21 of these nodules were diagnosed histopathologically as malignant. The scores of 1 and 2 with Itoh criteria were significantly seen in benign nodules, whereas, scores of 3 and 4 were significantly seen in malignant nodules (p < 0.05) with sensitivity 84%, specificity 84.7%, PPV 70%, NPV 92.6% and accuracy 84.5%. The mean SR for the benign nodules and malignant ones was significantly different (2.92 ± 0.96 vs. 4.53 ± 0.82, p < 0.001). With ROC analysis, the best cut-off strain ratio point was 3.5 for differentiating benign and malignant nodules with area under the curve (AUC) = 0.87 (0.8–0.95). The sensitivity of the strain ratio was 88%, while the specificity was 86.4%, PPV = 73.3%, NPV = 94.4% and accuracy = 86.9%.

Conclusions

Both the elastographic score and strain ratio are higher in malignant nodules than those in benign ones. Ultrasound elastography can provide quantitative information on thyroid nodule helping in differentiating benign and malignant ones.     

彩色多普勒超声诊断良恶性甲状腺结节的参考价值

目的分析良、恶性甲状腺结节的彩色多普勒超声表现,以提高超声诊断和鉴别诊断良、恶性甲状腺结节的价值。方法回顾性分析经手术、病理明确诊断的157个良、恶性甲状腺结节的彩色多普勒超声表现,良、恶性结节的形态、回声、钙化特点、彩色多普勒血流图血流信号分布等。结果157个甲状腺结节经病理诊断,其中 90个为良性结节,67个为恶性结节;本组病例彩色多普勒超声检查的特异性为92.2%,敏感性为80.6%,诊断符合率为87.2%;彩色多普勒超声图像显示甲状腺良、恶性结节的形态、边界、包膜、回声、血流信号分布、内部钙化情况、血流阻力指数值比较,差异比较均具有统计学意义（P<0.05）。结论彩色多普勒超声可诊断甲状腺病变,依据重要的参考指标,可评价甲状腺结节的良、恶性。     

Role of ultrasound,color doppler,elastography and micropure imaging in differentiation between benign and malignant thyroid nodules

Purpose

To evaluate the role of ultrasound elastography, Doppler and micropure imaging in the assessment of thyroid nodules, using the pathological analysis as the reference standard.

高频彩超及弹性成像对甲状腺结节良恶性的鉴别诊断价值

目的：对甲状腺小结节高频彩超及弹性成像表现进行多因素 Logistic 回归分析,探讨其对良恶性鉴别诊断的价值。方法：回顾性分析经手术病理确诊的126个直径≤2 cm 的甲状腺结节的超声表现,根据每个结节的高频超声及弹性成像声像图特征进行分类,采用二分类多因素 Logistic 回归分析,筛选出评价甲状腺恶性结节的因素,建立概率方程。结果：根据多因素 logistic 回归分析结果,边界不清、纵横比≥1、微钙化、极低回声、弹性成像评分是鉴别甲状腺小结节良恶性的关键因素。回归模型预测超声诊断甲状腺结节良恶性的符合率为89．7％,其中良性结节的诊断符合率为90．0％,恶性结节的诊断符合率为89．3％,ROC 曲线下面积为0．959。结论：多因素 Logistic 回归模型可筛选出对甲状腺小结节良恶性有鉴别诊断意义的特征性变量,综合评价各个变量,有利于甲状腺结节良恶性的鉴别诊断。