Hybrid Dual Energy (HDE) Fluoroscopy for Real-Time Tracking of Lung Tumors JC Roeske PhD, R Patel PhD, M Campana BS, J Panfil BS, M Surucu PhD, AM Block.

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Hybrid Dual Energy (HDE) Fluoroscopy for Real-Time Tracking of Lung Tumors JC Roeske PhD, R Patel PhD, M Campana BS, J Panfil BS, M Surucu PhD, AM Block MD, M Harkenrider MD Loyola University Medical Center, Maywood, IL 60153

Background Dual energy (DE) imaging uses high and low kVp images to perform a weighted subtraction and produce soft tissue images Elimination of bone results in improved visualization of lung tumors Combining DE with fluoroscopy may provide ability to perform markerless-motion tracking This would require hardware upgrades to most on-board imaging systems A hybrid approach is described that uses DE images from single frame, and applies this to subsequent fluoroscopy images

Results and Conclusions Comparison of template-based motion tracking between HDE and frame-by-frame DE subtraction showed no statistical difference in tracking coordinates or tumor detectability This approach may allow for markerless tracking of lung tumors using existing on- board imaging systems with only minor software enhancements