There is a lack of a comprehensive picture of plaque geometry and composition of unstable atherosclerotic lesions as observed with intravascular ultrasound techniques.

中文翻译：

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血管内超声对冠状动脉粥样硬化斑块不稳定特征的洞察：系统评价和荟萃分析

血管内超声技术观察到的斑块几何形状和不稳定动脉粥样硬化病变的组成缺乏全面的图像。