Value of strain ratio in differential diagnosis of thyroid tumors:compared with evaluation based on elastography scores

VernacularTitle:弹性成像评分法与应变率比值对甲状腺肿块鉴别诊断的对比研究
Author: Hongxia HAN ; Chunping NING ; Jiawei TIAN ; Litao SUN
Publication Type:Journal Article
Keywords: Ultrasonography; Thyroid diseases; Elastography
From:Chinese Journal of Ultrasonography 2011;20(5):402-405
CountryChina
Language:Chinese
Abstract: Objective To investigate the clinical value of strain ratio in differential diagnosis of thyroid tumors,compared with the evaluation based on elastography scores.Methods Elastography examinations were performed in 67 patients with 92 thyroid tumors.Ultrasonic elastograms were evaluated according to the four- and five-score system respectively.Strain ratio of the tumor and the surrounding tissue was also calculated.Clinical value of the three evaluations was compared with pathological findings as the reference standard.Results The area under the curve:0.885 for the four-score,0.904 for the five-score,0.961 for the strain ratio.When a cutoff point of 3 was used,four-score and five-score showed a sensitivity of 78.0%,a specificity of 86.3%,an accuracy of 82.6% and a sensitivity of 80.5%,a specificity of 88.2%,an accuracy of 84.8%,respectively.When a cutoff point of 3.57 was introduced,the strain ratio had 92.7% sensitivity,92.2% specificity,92.4% accuracy.Conclusions Strain ratio was more helpful in diagnostic performance of thyroid tumors as a new semi-quantitative method than elastography scores.