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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 >Rapid fusion of 2D X-ray fluoroscopy with 3D multislice CT for image-guided electrophysiology procedures
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Rapid fusion of 2D X-ray fluoroscopy with 3D multislice CT for image-guided electrophysiology procedures

机译：2D X射线荧光检查与3D多层CT的快速融合，可用于图像引导电生理程序

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摘要

Interventional cardiac electrophysiology (EP) procedures are typically performed under X-ray fluoroscopy for visualizing catheters and EP devices relative to other highly-attenuating structures such as the thoracic spine and ribs. These projections do not however contain information about soft-tissue anatomy and there is a recognized need for fusion of conventional fluoroscopy with pre-operatively acquired cardiac multislice computed tomography (MSCT) volumes. Rapid 2D-3D integration in this application would allow for real-time visualization of all catheters present within the thorax in relation to the cardiovascular anatomy visible in MSCT. We present a method for rapid fusion of 2D X-ray fluoroscopy with 3D MSCT that can facilitate EP mapping and interventional procedures by reducing the need for intra-operative contrast injections to visualize heart chambers and specialized systems to track catheters within the cardiovascular anatomy. We use hardware-accelerated ray-casting to compute digitally reconstructed radiographs (DRRs) from the MSCT volume and iteratively optimize the rigid-body pose of the volumetric data to maximize the similarity between the MSCT-derived DRR and the intra-operative X-ray projection data.
机译：介入性心脏电生理（EP）程序通常在X射线荧光透视下执行，以使导管和EP装置相对于其他高度衰减的结构（如胸椎和肋骨）可视化。但是，这些投影不包含有关软组织解剖学的信息，并且公认需要将常规荧光检查与术前采集的心脏多层计算机断层扫描（MSCT）体积融合。这种应用中的快速2D-3D集成将允许实时显示与MSCT中可见的心血管解剖结构相关的胸腔内存在的所有导管。我们提出了一种将3D MSCT与2D X射线荧光透视技术快速融合的方法，该方法可通过减少术中对比剂注射来可视化心腔和跟踪心血管解剖结构内的导管的专用系统，从而促进EP映射和介入程序。我们使用硬件加速射线投射从MSCT体积计算数字重建射线照片（DRR），并迭代优化体积数据的刚体姿态，以最大程度地提高MSCT衍生DRR与术中X射线之间的相似性投影数据。

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