Direct Volume Rendering

raycasting
combine samples along ray into scene
back to front, rays forward from eye
splatting
front to back, rays backward from object
shear-warp
hybrid
HW-accel texture maps
use 3D texture, graphics hardware

dedicated hardware
realtime VolumePro board
Mitsubishi/RTViz/TeraRecon, SUNY
512x512x512 grid



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