Objective: We compare the repeatability and accuracy of ultrasound shear wave elastography (USE) and transient optical coherence elastography (OCE). Methods: Elastic wave speed in gelatin phantoms and chicken breast was measured with USE and OCE and compared with uniaxial mechanical compression testing. Intra- and Inter-repeatability were analyzed using Bland-Altman plots and intraclass correlation coefficients (ICC). Results: OCE and USE differed from uniaxial testing by a mean absolute percent error of 8.92% and 16.9%, respectively, across eight phantoms of varying stiffness. Upper and lower limits of agreement for intrasample repeatability for USE and OCE were ±0.075 m/s and −0.14 m/s and 0.13 m/s, respectively. OCE and USE both had ICCs of 0.9991. In chicken breast, ICC for USE was 0.9385 and for OCE was 0.9924. Conclusion: OCE and USE can detect small speed changes and give comparable measurements. These measurements correspond well with uniaxial testing.

中文翻译：

---

超声剪切波弹性成像和瞬态光学相干弹性成像：重复性和准确性的并排比较


目的：我们比较超声剪切波弹性成像（USE）和瞬态光学相干弹性成像（OCE）的可重复性和准确性。方法：使用 USE 和 OCE 测量明胶模型和鸡胸肉中的弹性波速度，并与单轴机械压缩测试进行比较。使用 Bland-Altman 图和组内相关系数 (ICC) 分析组内和组间重复性。结果：对于八个不同刚度的体模，OCE 和 USE 与单轴测试的平均绝对百分比误差分别为 8.92% 和 16.9%。 USE 和 OCE 的样本内重复性一致性上限和下限分别为 ±0.075 m/s、-0.14 m/s 和 0.13 m/s。 OCE 和 USE 的 ICC 均为 0.9991。在鸡胸肉中，USE 的 ICC 为 0.9385，OCE 的 ICC 为 0.9924。结论：OCE 和 USE 可以检测微小的速度变化并提供可比较的测量结果。这些测量结果与单轴测试非常吻合。