Abstract #1647
Analysis of Respiratory-induced 3D Deformation of Liver based on Branching Structure of Portal Vein obtained with Time-resolved Volume Acquisitions
Etsuko Kumamoto 1 , Tastuhiko Matsumoto 2 , Daisuke Kokuryo 3 , and Kagayaki Kuroda 4,5
1
Information Science and Technology Center,
Kobe University, Kobe, Hyogo, Japan,
2
Graduate
School of System Informatics, Kobe University, Kobe,
Hyogo, Japan,
3
Molecular
Imaging Center, National Institute of Radiological
Sciences, Chiba, Japan,
4
Graduate
School of Engineering, Tokai University, Hiratsuka,
Kanagawa, Japan,
5
Center
for Frontier Medical Engineering, Chiba University,
Chiba, Japan
3D deformation of the liver under slow breathing was
analyzed on the basis of the branching structure of the
portal veins. A series of sagittal, multi-slice fast
steady-state (FIESTA) images was acquired from a healthy
volunteerfs liver under slow-paced free respiration and
was reconstructed to 4D MR images based on diaphragm
positions. Regions of interest, including branching
vessels, were set and tracked with the 3D template
matching method. The extracted branching vessels showed
that the anterior tissue of the liver was extended, and
the posterior tissue of the liver was contracted against
the superior tissue of the liver, which was compressed
as the diaphragm fell.
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