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Related Concept Videos

Gross Anatomy of the Liver01:17

Gross Anatomy of the Liver

The liver, the largest gland within the human body, is a firm and reddish-brown organ. This wedge-shaped structure weighs approximately 1.5 kg and occupies a significant portion of the right hypochondriac and epigastric regions. It extends more to the right of the body's midline than to the left.
Located under the diaphragm, the liver is almost entirely ensconced within the rib cage, providing it with substantial protection. Except for the superior most bare area, the liver's surface is covered...

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DUCT: Double Resin Casting followed by Micro-Computed Tomography for 3D Liver Analysis
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Stereoscopic liver surface reconstruction.

Dominik Spinczyk1, Adam Karwan, Jerzy Rudnicki

  • 1Institute of Biomedical Engineering, Silesian University of Technology, Gliwice, Poland.

Wideochirurgia I Inne Techniki Maloinwazyjne = Videosurgery and Other Miniinvasive Techniques
|December 21, 2012
PubMed
Summary

This study introduces a practical method for measuring liver motion during surgery using standard laparoscopic cameras and a single incision laparoscopic surgery (SILS) trocar. The technique accurately reconstructs liver movement without extra sensors, aiding surgical precision.

Keywords:
3D reconstructionabdominal surgeryliver motion

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Area of Science:

  • Minimally Invasive Surgery
  • Surgical Navigation
  • Medical Imaging

Background:

  • Accurate measurement of liver motion is crucial for surgical planning and execution, especially during complex procedures.
  • Existing methods for tracking organ movement can be invasive or require specialized equipment.
  • Standard operating room equipment offers potential for developing practical motion measurement tools.

Purpose of the Study:

  • To develop and evaluate a practical method for measuring liver motion (respiratory and tool-guided) in the operating room.
  • To utilize standard laparoscopic cameras and a single incision laparoscopic surgery (SILS) trocar for liver motion reconstruction.
  • To assess the accuracy of the proposed method against established tracking systems.

Main Methods:

  • A triangulation algorithm was employed using stereo correspondence points manually marked by two independent experts.
  • Camera calibration was performed using perpendicular chessboards, a pinhole camera model, and the Tsai algorithm.
  • Data comprised twelve real liver surgery video sequences (ten open, two laparoscopic); evaluation used chessboard reconstruction and a Polaris Vicra tracking system.

Main Results:

  • The study successfully demonstrated the reconstruction of liver motion, including respiratory and tool-guided movements, using standard laparoscopic equipment.
  • The method proved effective for both left and right liver lobes, utilizing the SILS trocar without additional position or movement sensors.
  • Evaluation against the Polaris Vicra system confirmed the feasibility and accuracy of the proposed approach.

Conclusions:

  • A practical and sensor-free approach for measuring liver motion during surgery has been established using readily available laparoscopic tools.
  • The developed method enables accurate reconstruction of liver dynamics, potentially enhancing surgical navigation and patient outcomes.
  • Future research may explore the integration of additional sensors like cameras and lasers for distance measurement in laparoscopic settings.