[Rtk-users] Can not reconstruct a volume with size of 1743*998*1761 ???

[Guangming Zang]

​H​i chao,
Thanks very much for the prompt reply.
i am sorry but it mean "GPU RAM"  when you say GRAM??  if yes, then it is 2
GB or 4GB(i need check when in lab tomorrow).  But i was wondering when i
run algorithm like  basic SART or FDK, are they related to GPU or GRAM??
Yes, i tried it by GPU as well, i mean, when use SART algorithm,
besides some basic Multi threads algorithms in -f and -b, i also  tried the
forewardprojection and backprojection as CudaRayCast, CudaVoxelBased,
respectively, and  only to find that nothing in the reconstructed volume
(the slices are all black) in this GPU version . I tried in other simulated
data in the RTKwiki, the Cuda version still does not work. For SART with
Cuda ,the time elapsed is shown in attached file. and i remember when i
configure RTK in my computer, i allow the Cuda option.
So what is the problem could be??

Sorry for the long letter and thanks very much, like always
Regards
Guangming


*Guangming Zang (Alex)*
*King Abdullah University of Science and Technology(KAUST)*
*University of Chinese Academy of Sciences(UCAS)*




2015-06-10 17:06 GMT+03:00 Chao Wu <wuchao04 at gmail.com>:

> Hi Guangming,
>
> Did you also use GPU? Is there sufficient GRAM?
>
> Regards, Chao
>
> 2015-06-10 15:39 GMT+02:00 Guangming Zang <guangming.zang at kaust.edu.sa>:
>
>> Hi RTK community,
>> After i  used  FDK, SART, and ADMM to reconstruct several slices and
>> visualize them, i think the geometry settings are correct from the scanner
>> and the RTK.
>> However, when i want to reconstruct the whole volume(i.e., size of
>> 1743*998*1761) by using any of FDK, SART, ADMM , the applications stopped
>> working immediately. But when i changed it to only  reconstruct half of the
>> volume(i.e., 800*988*1761) it seems to be working fine(at least no pop up
>> with an error displays). My machine's memory size is over 50 GB.. and when
>> i ran these scanned data  on my own application to reconstruct a whole
>> volume, it works fine as well.
>> So can you help me to figure it out?
>>
>> Regards
>> Guangming
>>
>> *Guangming Zang (Alex)*
>> *King Abdullah University of Science and Technology(KAUST)*
>> *University of Chinese Academy of Sciences(UCAS)*
>>
>>
>>
>>
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