Etsuko Kumamoto1, Yoshie Takao2, Daisuke Kokuryo3, Atsuya Okada4, Takamichi Murakami5, Toshiya Kaihara2, Kagayaki Kuroda6,7
1Information Science and Technology Center, Kobe University, Kobe, Hyogo, Japan; 2Graduate School of Engineering, Kobe University, Kobe, Japan; 3National Institute of Radiological Sciences, Chiba, Japan; 4Iseikai Hospital, Osaka, Japan; 5School of Medicine, Kinki University, Osaka, Japan; 6Graduate School of General Science and Technology, Tokai University, Hiratsuka, Kanagawa, Japan; 7Institute of of Biomedical Research and Innovation, Kobe, Hyogo, Japan
A three dimensional (3D) target tracking technique for MR-guided Focused Ultrasound Surgery (MRgFUS) of liver was proposed. This technique detects the through-plane motion and deformation of the tissue based on the 3D vessel tree structure and the along-plane displacements of the vessels in the saggital slices. Experiment with a healthy volunteer liver demonstrated that the vessel displacements through the sagittal plane reached 11.4mm indicating that the tissue motion and deformation in this direction is not negligible and hence such a three dimensional target tracking technique is necessary for a highly accuracy treatment of the moving organ.