[Rtk-users] Digital Breast Tomosynthesis - Iterative reconstruction

[Padraig Looney]

Thanks for looking into this.

Yes. We can use the back projection filters fine. Although, we have yet to
modify the ramp filters to suit our usecase.



On Thu, Jun 11, 2015 at 2:12 PM, Simon Rit <simon.rit at creatis.insa-lyon.fr>
wrote:

> Hi,
> I have received your data and run the attached test. I also get the error
> "Description: itk::ERROR: Cannot account for too large detector
> displacements, a part of space must be covered by all projections."
> wtih rtkfdk. Did you use rtkfdk for testing FDK? Your email suggested that
> it worked for FDK but it doesn't work for me...
> Given your geometry, this is the expected behavior. If you still want to
> try the iterative reconstruction, you'll have to shunt the displaced
> detector filter in the pipelines using the documentation, see for example this
> image <http://www.openrtk.org/Doxygen/dot_inline_dotgraph_20.png> for
> sart.
> Simon
>
> PS: maybe we will consider changing the error to a simple warning and
> doing nothing in such cases, I'll discuss it with the local iterative pope
>
> On Wed, Jun 10, 2015 at 1:40 PM, Simon Rit <simon.rit at creatis.insa-lyon.fr
> > wrote:
>
>> Hi,
>> Can you send the mhd header and the geometry file to reproduce the bug?
>> You don't have to send the data, we should be able to simulate it.
>> Thanks,
>> Simon
>>
>> On Wed, Jun 10, 2015 at 1:35 PM, Padraig Looney <padraig.looney at gmail.com
>> > wrote:
>>
>>> Dear All,
>>>
>>>
>>> In my group we have been using RTK for digital breast tomosynthesis. We
>>> have successfully used the back projection FDK algorithms to reconstruct
>>> our stack of planes. I have been trying to use the SART filter instead to
>>> compare. The geometry has remained the same as for the case of the back
>>> projection but I now get an ITK error at runtime
>>>
>>> itk::ERROR: Cannot account for detector displacement larger than 50% of
>>> panel size. Corner inf=-0 and corner sup=-163.422
>>>
>>> Any help would be appreciated.
>>>
>>> Thanks
>>> Pádraig
>>>
>>> _______________________________________________
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>>> Rtk-users at public.kitware.com
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>>>
>>>
>>
>
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