Registration of pre- and intraoperative images is a crucial step of surgical liver navigation, where rigid registration of vessel centerlines is currently commonly used. When using 3D ultrasound (US), accuracy during navigation might be influenced by the size of the intraoperative US volume, yet the relationship between registration accuracy and US volume size is understudied. In this study, we specify an optimal 3D US volume size for registration using varying volumes of liver vasculature. While previous studies measured accuracy at registered fiducials, in this work, accuracy is determined at the target lesion which is clinically the most relevant structure.

中文翻译：

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技术说明：在肿瘤肝脏手术期间验证 3D 超声图像配准

术前和术中图像的配准是外科肝脏导航的关键步骤，目前通常使用血管中心线的刚性配准。使用 3D 超声 (US) 时，导航过程中的准确性可能会受到术中超声体积大小的影响，但尚未对配准准确性与超声体积大小之间的关系进行研究。在这项研究中，我们指定了一个最佳的 3D US 体积大小，用于使用不同体积的肝血管系统进行配准。虽然以前的研究测量了注册基准的准确性，但在这项工作中，准确性是在临床上最相关的结构的目标病变处确定的。