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21 March 2007 Multimodality image guidance system integrating x-ray fluoroscopy and ultrasound image streams with electromagnetic tracking
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This work presents an integrated system for multimodality image guidance of minimally invasive medical procedures. This software and hardware system offers real-time integration and registration of multiple image streams with localization data from navigation systems. All system components communicate over a local area Ethernet network, enabling rapid and flexible deployment configurations. As a representative configuration, we use X-ray fluoroscopy (XF) and ultrasound (US) imaging. The XF imaging system serves as the world coordinate system, with gantry geometry derived from the imaging system, and patient table position tracked with a custom-built measurement device using linear encoders. An electromagnetic (EM) tracking system is registered to the XF space using a custom imaging phantom that is also tracked by the EM system. The RMS fiducial registration error for the EM to X-ray registration was 2.19 mm, and the RMS target registration error measured with an EM-tracked catheter was 8.81 mm. The US image stream is subsequently registered to the XF coordinate system using EM tracking of the probe, following a calibration of the US image within the EM coordinate system. We present qualitative results of the system in operation, demonstrating the integration of live ultrasound imaging spatially registered to X-ray fluoroscopy with catheter localization using electromagnetic tracking.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Luis F. Gutiérrez, Guy Shechter, Douglas Stanton, Sandeep Dalal, Daniel Elgort, Robert Manzke, Raymond C. Chan, and Lyubomir Zagorchev "Multimodality image guidance system integrating x-ray fluoroscopy and ultrasound image streams with electromagnetic tracking", Proc. SPIE 6509, Medical Imaging 2007: Visualization and Image-Guided Procedures, 65090K (21 March 2007);

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