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Introduction
- Temporal bone surgery among most complex
- Average $80,000/year to properly train ENT surgeons
- Lack of cadaveric training material
Using FLeX for Real-time Fluid Simulation in Virtual Surgery Brad - - PowerPoint PPT Presentation
Using FLeX for Real-time Fluid Simulation in Virtual Surgery Brad - - PowerPoint PPT Presentation
Using FLeX for Real-time Fluid Simulation in Virtual Surgery Brad Hittle May 11 th 2017 Slide 1 Introduction Temporal bone surgery among most complex Average $80,000/year to properly train ENT surgeons Lack of cadaveric training
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Virtual Surgery
- Complex surgeries
- Teaching/Training
- Informative feedback
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Slide 4
Fluid Simulation?
- Multi-instrument process
- Visibility
- Temperature
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Slide 5
Fluid Setup
- Fixed number of particles
- Recycle particles
- Blood and saline same phase
- Multiple mesh collisions
- Signed Distance Field (SDF)
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SDF Issues
- Too expensive for real-time performance
- Particles fall through SDF
Dataset Size 768
3 (s)
384
3 (s)
192
3 (s)
96
3 (s)
Intel Xeon E5-1650 v3 3.5 GHz 2179.01 216.517 19.6141 1.52809
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Slide 7
SDF Approximation
- Subsample
- Edge detection
- Shelling algorithm
- Scale
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Slide 8
SDF Results
0.001 0.01 0.1 1 10 768 384 192 96 Time (s) Quadro K5000 Quadro M5000 Quadro P5000 Quadro GP100
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Cost of Approximation?
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Slide 10
Irrigation
- Emitters
- Absorbers
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Slide 11
Blood Label
- Setup
- Algorithm
- Cull Extra Voxels
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Bleeding
- Create static emitter
- Constant bleeders for critical structures
- Blood and saline mixing
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Slide 13
Multi-thread configuration
void updateThread (FluidSim *sim) { sim->init (); std::thread upThread = std::thread([sim] { updateThread(sim); }); while (!sim->ShuttingDown) { double dt = 1.0 / float (sim->DeltaTime); double startTime = timer.read (); sim->update (); while (timer.read () - startTime < dt){} } upThread.join(); }
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Slide 14
Multi-thread configuration
void updateThread (FluidSim *sim) { sim->init (); std::thread upThread = std::thread([sim] { updateThread(sim); }); while (!sim->ShuttingDown) { double dt = 1.0 / float (sim->DeltaTime); double startTime = timer.read (); sim->update ();
while (timer.read () - startTime < dt){}
} upThread.join(); }
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Multi-GPU
Main Thread (Render) Fluid Update Update Fluid buffers For Rendering Add emitter Remove suction FLeX Update GPU 0 GPU 1 Update Volume for SDF
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Simulation in Action
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Simulation in Action
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Simulation in Action
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Simulation in Action
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Special Thanks
- Hector Medina-Fetterman
- Dennis Sessanna (NVIDIA)
- Funded by NIDCD - R01 DC011321 (2011-2016)
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