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1 March 2008Real-time computed tomography on the cell broadband engine processor
Tomographic image reconstruction is computationally very demanding. In all cases the backprojection represents the performance bottleneck due to the high operational count and resulting high demand put on the memory subsystem. In this study, we present the implementation of a cone beam reconstruction algorithm on the Cell Broadband Engine (CBE) processor aimed at real-time applications. The cone-beam backprojection performance was assessed by backprojecting a half-circle scan of 512 projections of 10242 pixels into a volume of size 5123 voxels. The projections are acquired on a C-Arm scanner and directed in real time to a CBE-based platform for real-time reconstruction. The acquisition speed typically ranges between 17 and 35 projections per second. On a CBE processor clocked at 3.2 GHz, our implementation performs this task in ~13 seconds, allowing for real time reconstruction.
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Olivier Bockenbach, Michael Knaup, Marc Kachelriess, "Real-time computed tomography on the cell broadband engine processor," Proc. SPIE 6812, Image Processing: Algorithms and Systems VI, 68120E (1 March 2008);