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</o:shapelayout></xml><![endif]--></head><body lang=EN-IN link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi everyone,<o:p></o:p></span></p><p class=MsoNormal>While going through the RTK installation documentation, I came across the RTK_CUDA_PROJECTIONS_SLAB_SIZE parameter, which can be configured during the CMake process. This parameter defines the number of projections processed simultaneously during CUDA processing, with the default value set to 16.<o:p></o:p></p><p class=MsoNormal>My understanding is that increasing this value should, in theory, reduce the overall runtime of the FDK reconstruction when using CUDA. However, I tried increasing it to 32 and 64, but observed no noticeable improvement in runtime. I’m using an NVIDIA Quadro RTX 6000 GPU.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Has anyone else experimented with this parameter or can provide insight into why changing the value doesn't seem to affect performance? <o:p></o:p></p><p class=MsoNormal>Any suggestions or guidance would be appreciated!<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you!<o:p></o:p></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>