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Abstract #5436

A Three-dimensional Target Tracking Technique for MRgHIFU using an Image Matching Method with Liver Deformation Volumes Obtained via Time-Resolved Volume Acquisitions

Etsuko Kumamoto1,2, Daisuke Kokuryo2, and Kagayaki Kuroda3,4

1Information Science and Technology Center, Kobe University, Kobe, Japan, 2Graduate School of System Informatics, Kobe University, Kobe, Japan, 3Graduate School of Engineering, Tokai University, Hiratsuka, Japan, 4Center for Frontier Medical Engineering, Chiba University, Chiba, Japan

MRgHIFU treatment for liver requires a tracking technique to “lock on” to the focal spot at the target tissue region during respiratory-induced motion for targeting and temperature imaging. Here, we proposed a target tracking technique using template matching methods. A pre-operative, multi-slice sagittal image series under natural slow breathing was acquired, and a database, including a three-dimensional translation and deformation behavior of the liver and the target, was constructed. Intra-operative target tracking was performed by acquiring a single sagittal slice. The experimental results were demonstrated the feasibility of the three-dimensional target tracking technique using a template matching methods.

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