Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea.
Eur J Radiol. 2013 Aug;82(8):e326-31. doi: 10.1016/j.ejrad.2013.03.007. Epub 2013 Mar 30.
To compare the diagnostic performance of qualitative shear-wave elastography (SWE) according to three different color map opacities for breast masses
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 (Ehomo) and six-point color score of maximum elasticity (Ecol). 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.
A visual color pattern, Ehomo, Ecol 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, Ecol, Ehomo 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 Ecol showed significantly higher AUC than Ehomo. In addition, a combined set of B-mode US and SWE showed significantly higher AUC than SWE alone for color patterns, Ehomo, but no significant difference was found in Ecol.
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.
比较三种不同色彩图透明度下定性剪切波弹性成像（SWE）的诊断性能，用于乳腺肿块。
101 名年龄在 21-77 岁之间的患者，共 113 个乳腺肿块，在活检或手术前进行 B 超和 SWE 检查，并分别采用三种不同色彩图透明度（50%、19%和 100%）。评估以下 SWE 特征：视觉模式分类（模式 1-4）、色彩均匀性（Ehomo）和最大弹性的六点色彩评分（Ecol）。结合 B 超和 SWE，还对恶性可能性（LOM）进行评分。通过 ROC 曲线分析获得曲线下面积（AUC），以评估每种色彩透明度下的诊断性能。
在所有色彩透明度下，良性和恶性病变的视觉色彩模式、Ehomo、Ecol 和 LOM 评分均有显著差异（P<0.001）。对于 50%的透明度，视觉色彩模式、Ecol、Ehomo 和 LOM 评分的 AUC 分别为 0.902、0.951、0.835 和 0.975。但是，对于每个 SWE 特征，在三种不同色彩透明度下，AUC 没有显著差异。在所有色彩透明度下，视觉色彩模式和 Ecol 的 AUC 均显著高于 Ehomo。此外，与单独的 SWE 相比，B 超和 SWE 的联合应用在色彩模式、Ehomo 方面具有显著更高的 AUC，但在 Ecol 方面没有显著差异。
在所有色彩透明度下，定性 SWE 可用于区分良性和恶性乳腺病变。色彩图透明度的差异对 SWE 的诊断性能没有显著影响。
