| Popis: |
3D interactive technologies become more and more applicable in nowadays medicine. Fast 3D reconstruction of CT-data is one of the examples. We present an acceleration of relevant reconstruction algorithms using FPGAs. For this purpose we used a board based on Xilinx Virtex II6000. Our system is able to reconstruct a 2563 voxel volume from 120 projections (5122j in 9s, using the filtered backprojection algorithm. In addition, it is shown how such a system is used to accelerate iterative algorithms, whereby the forward projection is performed by graphics hardware. The performance for iterative approaches is 4 min for SIRT (10 iterations) and 3 minutes for OS-EM (6 iterations) where the main limitation is the forward projection. |
