Abstract

During liver surgery, laparoscopic ultrasounds (LUS) require the visualization of blood vessels surrounding a liver tumor. However, this kind of imaging is difficult because of an insufficient positioning degrees-of-freedom (DOF) of LUS devices. We are currently developing multi-DOF LUS manipulators in order to realize autonomous functionality. First, we develop a method to detect the longitudinal section view of a blood vessel in acquired LUS images. Then, we successfully determine the longitudinal-section view by calculating the ratio of the blood-vessel area to the entire image area.

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