Diagnostic performance of qualitative shear-wave elastography according to different color map opacities for breast masses

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• 作者：Hana Kim ; Ji Hyun Youk ; Hye Mi Gweon ; Jeong-Ah Kim ; Eun Ju Son
• 关键词：Breast ; Ultrasound ; Elastography ; Shear wave
• 刊名：European Journal of Radiology
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：82
• 期：8
• 页码：e326-e331
• 全文大小：1519 K

文摘

Purpose

To compare the diagnostic performance of qualitative shear-wave elastography (SWE) according to three different color map opacities for breast masses

Materials and methods

101 patients aged 21-77 years with 113 breast masses underwent B-mode US and SWE under three different color map opacities (50 % , 19 % and 100 % ) before biopsy or surgery. Following SWE features were reviewed: visual pattern classification (pattern 1-4), color homogeneity (E_homo) and six-point color score of maximum elasticity (E_col). Combined with B-mode US and SWE, the likelihood of malignancy (LOM) was also scored. The area under the curve (AUC) was obtained by ROC curve analysis to assess the diagnostic performance under each color opacity.

Results

A visual color pattern, E_homo, E_col and LOM scoring were significantly different between benign and malignant lesions under all color opacities (P < 0.001). For 50 % opacity, AUCs of visual color pattern, E_col, E_homo and LOM scoring were 0.902, 0.951, 0.835 and 0.975. But, for each SWE feature, there was no significant difference in the AUC among three different color opacities. For all color opacities, visual color pattern and E_col showed significantly higher AUC than E_homo. In addition, a combined set of B-mode US and SWE showed significantly higher AUC than SWE alone for color patterns, E_homo, but no significant difference was found in E_col.

Conclusion

Qualitative SWE was useful to differentiate benign from malignant breast lesion under all color opacities. The difference in color map opacity did not significantly influence diagnostic performance of SWE.