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首页> 外文会议>Visualization, Image-Guided Procedures pt.2; Progress in Biomedical Optics and Imaging; vol.8 no.28; Proceedings of SPIE-The International Society for Optical Engineering; vol.6509 pt.2 >Intra-Cardiac 2D US to 3D CT Image Registration
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Intra-Cardiac 2D US to 3D CT Image Registration

机译：心脏内2D US至3D CT图像配准

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摘要

Intra-cardiac echocardiography (ICE) is commonly used to guide intra-cardiac procedures, such as the treatment of atrial fibrillation (AF). However, effective surgical navigation based on ICE images is not trivial, due to the low signal-to-noise ratio (SNR) and limited field of view of ultrasound (US) images. The interpretation of ICE can be significantly improved if correctly placed in the context of three-dimensional magnetic resonance (MR) or computed tomography (CT) images by simultaneously presenting the complementary anatomical information from the two modalities. The purpose of this research is to demonstrate the feasibility of multimodality image registration of 2D intra-cardiac US images with 3D computed tomography (CT) images. In our previous work, a two-step registration procedure has been proposed to register US images with MR images and was validated on a patient dataset. In this work, we extend the two-step method to intra-cardiac procedures and provide a detailed assessment of registration accuracy by determining the target registration errors (TRE) on a heart phantom, which had fiducial markers affixed to the surface to facilitate evaluation of registration accuracy. The resultant TRE on the heart phantom was 3.7 mm. This result is considered to be acceptable for guiding a probe in the heart during ablative therapy for atrial fibrillation. To our knowledge, there is no previous report describing multimodality registration of 2D intra-cardiac US to high-resolution 3D CT.
机译：心脏内超声心动图（ICE）通常用于指导心脏内操作，例如房颤（AF）的治疗。然而，由于低信噪比（SNR）和超声（US）图像的有限视野，基于ICE图像进行有效的手术导航并非易事。如果将ICE的解释正确地放置在三维磁共振（MR）或计算机断层扫描（CT）图像中，则可以同时显示来自两种模态的互补解剖信息，从而可以大大改善ICE的解释。这项研究的目的是证明2D心脏内US图像与3D CT图像进行多模态图像配准的可行性。在我们之前的工作中，已经提出了两步注册程序来将美国图像与MR图像进行注册，并在患者数据集中进行了验证。在这项工作中，我们将两步法扩展至心脏内手术，并通过确定心脏幻影上的目标注册错误（TRE）来详细评估注册准确性，该目标模型上已贴有基准标记以方便评估套准精度。心脏体模上的最终TRE为3.7 mm。该结果被认为对于在心房颤动的消融治疗期间在心脏中引导探针是可接受的。据我们所知，以前没有报道描述2D心脏内US到高分辨率3D CT的多模态配准。

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