Minimally invasive holographic surface scanning for soft-tissue image registration.
Minimally invasive holographic surface scanning for soft-tissue image registration.
复制标题
DOI：
10.1109/tbme.2010.2040736
复制
发表时间：
2010-06
期刊：
影响因子：
--
通讯作者：
Webster RJ 3rd
中科院分区：
文献类型：
--
作者：
Lathrop RA;Hackworth DM;Webster RJ 3rd
配准方面的最新进展已经将手术内图像引导从其在基于骨的程序中的起源扩展到软组织中的新应用，从而使得能够在切口开始之前可视化手术器械与表面下结构之间的空间关系。术前图像通常通过将分割的体积图像数据与术中感测的器官表面点云对准而配准到软组织。然而，目前还没有可行的非接触式微创扫描技术，可以通过一个单一的腹腔镜端口收集这些点，这限制了软组织图像引导的广泛采用。在本文中，我们描述了一个系统的基础上锥光全息术，能够微创表面扫描。我们提出了几个验证实验的结果，扫描离体生物和幻影组织与系统组成的跟踪，现成的，相对便宜的锥光全息单位。这些实验表明锥光全息术适用于生物组织，并且可以提供与需要开放手术的现有临床使用的激光范围扫描系统相当的质量的表面扫描。我们的实验表明，锥光全息术可以用来引导手术针所需的地下目标的平均尖端误差小于3毫米。
Recent advances in registration have extended intra-surgical image guidance from its origins in bone-based procedures to new applications in soft tissues, thus enabling visualization of spatial relationships between surgical instruments and subsurface structures before incisions begin. Preoperative images are generally registered to soft tissues through aligning segmented volumetric image data with an intraoperatively sensed cloud of organ surface points. However, there is currently no viable noncontact minimally invasive scanning technology that can collect these points through a single laparoscopic port, which limits wider adoption of soft-tissue image guidance. In this paper, we describe a system based on conoscopic holography that is capable of minimally invasive surface scanning. We present the results of several validation experiments scanning ex vivo biological and phantom tissues with a system consisting of a tracked, off-the-shelf, relatively inexpensive conoscopic holography unit. These experiments indicate that conoscopic holography is suitable for use with biological tissues, and can provide surface scans of comparable quality to existing clinically used laser range scanning systems that require open surgery. We demonstrate experimentally that conoscopic holography can be used to guide a surgical needle to desired subsurface targets with an average tip error of less than 3 mm.