Ultrasound to video registration using a bi-plane transrectal probe with photoacoustic markers
Ultrasound to video registration using a bi-plane transrectal probe with photoacoustic markers
复制标题
使用带有光声标记的双平面经直肠探头进行超声到视频配准
DOI：
10.1117/12.2216644
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
E. Boctor
中科院分区：
文献类型：
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作者：
Alexis Cheng;Hyun;Haichong K. Zhang;R. Taylor;E. Boctor
现代手术场景通常通过视频和其他成像模态的融合为外科医生提供附加信息。为了提供这些信息，手术中使用的工具和设备必须与介入引导设备和手术导航系统一起注册。在这项工作中，我们专注于明确注册超声与立体摄像机系统使用光声标记。先前的工作已经表明，光声标记可以用于该配准任务中，以实现低于当前可用系统的目标配准误差。光声标记被定义为投射到某个表面上的一组非共线激光光斑。由于光声效应，它们可以通过立体摄像系统和超声换能器同时可视化。在最近的工作中，三维超声体积被来自凸阵列换能器的单个超声图像姿态的图像所取代。这种方法的可行性得到了证明，但由于凸阵换能器的物理限制，精度不足。在这项工作中，我们提出了使用双平面经直肠超声换能器。使用这种类型的换能器的主要优点是超声元件不再限于单个平面。虽然这种发展将限于前列腺应用，但如果构建了合适的换能器，肝脏和肾脏应用也是可行的。这项工作是证明在两个实验中，一个没有光声源，一个。这些实验的目标配准误差分别为1.07 mm ± 0.35 mm和1.27 mm ± 0.47 mm，均优于当前可用的导航系统。
Modern surgical scenarios typically provide surgeons with additional information through fusion of video and other imaging modalities. To provide this information, the tools and devices used in surgery must be registered together with interventional guidance equipment and surgical navigation systems. In this work, we focus explicitly on registering ultrasound with a stereo camera system using photoacoustic markers. Previous work has shown that photoacoustic markers can be used in this registration task to achieve target registration errors lower than the current available systems. Photoacoustic markers are defined as a set of non-collinear laser spots projected onto some surface. They can be simultaneously visualized by a stereo camera system and an ultrasound transducer because of the photoacoustic effect. In more recent work, the three-dimensional ultrasound volume was replaced by images from a single ultrasound image pose from a convex array transducer. The feasibility of this approach was demonstrated, but the accuracy was lacking due to the physical limitations of the convex array transducer. In this work, we propose the use of a bi-plane transrectal ultrasound transducer. The main advantage of using this type of transducer is that the ultrasound elements are no longer restricted to a single plane. While this development would be limited to prostate applications, liver and kidney applications are also feasible if a suitable transducer is built. This work is demonstrated in two experiments, one without photoacoustic sources and one with. The resulting target registration error for these experiments were 1.07mm±0.35mm and 1.27mm±0.47mm respectively, both of which are better than current available navigation systems.