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

[Guangming Zang]

Well....i do not know how to explain, but after restarting my computer, it
works now for FDK at least. After FDK, i will try other algorithm, which i
think will work as well.
Thanks for your kind help.
Guangming



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




2015-06-11 0:08 GMT+03:00 Guangming Zang <guangming.zang at kaust.edu.sa>:

> ​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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>>
>>
>

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