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Abstract #2341

Analysis of Three-dimensional Liver Deformation under Free Breathing based on Branching Structure of Potral Vein for MR-guided Focused Ultrasound Surgery

Tatsuhiko Matsumoto 1 , Etsuko Kumamoto 1,2 , Daisuke Kokuryo 3 , and Kagayaki Kuroda 4,5

1 Kobe university, Kobe, Hyogo, Japan, 2 Information Science and Technology Center, Kobe, Japan, 3 Molecular Imaging Center, National Institute of Radiological Sciences, Chiba, Japan, 4 Tokai University, Hiratsuka, Japan, 5 Kobe International Frontier Medical Center, Kobe, Japan

Three-dimensional (3D) deformation of the liver under free breathing was analyzed using branching structure of portal veins. A series of sagittal, multi-slice fast steady-state (FIESTA) images were acquired in a healthy volunteerfs liver under slow-paced free respiration and were reconstructed to isotropic volume data. Branching points of the portal veins included in the volume were extracted by using our in-house 3D image processing software. The software-extracted branching points exhibited that the liver constricts in right-left (RL) direction for about 12 mm when came down to inferior with maximum inhalation.

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