Phantom Simulation of Liver Motion During Breathing

1. Phantom Simulation of Liver Motion During Breathing Group Members: Ian Henderlong Ian Dallmeyer Tuta Guerra Advisor: Dr. Bob Galloway

2. Background • Over 225,000 people in the U.S. diagnosed with primary or metastatic liver cancer in 2003. • Cancers often spread throughout the liver. • Traditional surgery difficult/not possible. • No IGS techniques for the abdomen. • Respiratory motion • Pigs • Liver structure different than humans.

3. Problem • Need an anatomically correct model which accurately simulates liver motion due to breathing to test IGLS techniques.

4. Market Potential • Current methods too invasive • Open liver resection • Estimated market for IGLS 10x current IGNS market • IGLS: $3.0-$7.5 billion • Reusable model needed to perfect IGLS techniques

5. Advantages of Phantom Model • Porcine Liver • Approx. $1,000 – $2,000 per liver • Not anatomically correct • Not reusable • Phantom model • Anatomically correct • Reusable • Time and space-saving

6. Phantom Liver • Equipment • Liver • Muscle Wire • PVC Pipe • Power Source • Sliding Mechanism System • Spring/Rubber Band/Elastic

7. Design Specs • Power Supply • 22 V (max) • AC / Frequency • Liver Movement • 1-D Linear (cranial- caudal) • 10.8 + 2.5 mm (ATLM) • Corresponding Muscle Wire Length

8. Current Work • Completing research • Purchasing muscle wire • Design and Assemble sliding mechanism • Purchasing materials for sliding mechanism

9. Future Work • Testing of muscle wire • Construction of power source • Assemble liver in PVC pipe

10. References • Herline AJ, Stefansic JD, Debelak JP, Hartmann SL, Wright Pinson C, Galloway RL, Chapman WC. Image Guided Surgery: Preliminary; Feasibility Studies of Frameless Stereotactic Liver Surgery. June 1999 Archives of Surgery 134:644-650