[vtkusers] CT Gantry Tilt correction

[David Gobbi]

Hi Satwik,

The VTK imaging pipeline works by "streaming", which means that if you
display one slice, then the entire pipeline is executed for that slice, and
when you move to the next slice, it re-executes for that next slice, etc.

It's easy to keep this from occurring.  Just call Update() on the filter
after you have set up the filter.  Even better, you can use SetInputData()
and GetOutput() to connect the filter.  In VTK 6, 7, and 8 these methods
will disable streaming.

If it still updates slowly after you've done this, let me know.

Cheers,

 - David


On Tue, Nov 28, 2017 at 8:59 AM, satwik k <satwik.k8 at gmail.com> wrote:

> Hi David,
>
> I'm using vtkDicomCtRectifier API to correct gantry rotation. But i'm
> facing slowness while updating.
>
> Is there any better way to speed up the computation. I tried it, by
> enabling SMP, but also facing slowness.
>
>
>
> Regards,
> Satwik k
>
> On Nov 28, 2017 10:14 AM, "satwik k" <satwik.k8 at gmail.com> wrote:
>
> Hi David, thanx for the reply... VTKDICOM module got compiled after
> cloning from git.
>
> Regards,
> Satwik k
>
> On Mon, Nov 27, 2017 at 10:14 PM, David Gobbi <david.gobbi at gmail.com>
> wrote:
>
>> Please keep your replies on-list (CC to vtkusers at vtk.org).
>>
>> It should build either way, but if you are on Windows, cloning is better
>> because git will give you the correct line-endings for the source files
>> (i.e. <CR><NL> on Windows instead of just <NL>).
>>
>> Just to be sure, did you find the build instructions?  They're on the
>> following page:
>> http://dgobbi.github.io/vtk-dicom/doc/api/installation.html
>>
>>  - David
>>
>>
>> On Mon, Nov 27, 2017 at 9:28 AM, satwik k <satwik.k8 at gmail.com> wrote:
>>
>>> Currently I'm trying to build vtkdicom using vtk 7.1..
>>> Trying to build using cmake. I'm getting vtkDICOMModule.h missing.
>>>
>>> I'm using Windows 7 and I downloaded vtkdicom as zip file from github.
>>>
>>> Should I clone it or by downloading zip file also it builds..?
>>>
>>> On Nov 27, 2017 21:46, "David Gobbi" <david.gobbi at gmail.com> wrote:
>>>
>>>> Please keep your replies on-list.
>>>>
>>>> What version of VTK?  I test every release to make sure that vtk-dicom
>>>> builds, but any information you can give might help me understand what's
>>>> going wrong.  And what compiler are you using?
>>>>
>>>>  - David
>>>>
>>>>
>>>>
>>>> On Mon, Nov 27, 2017 at 9:04 AM, satwik k <satwik.k8 at gmail.com> wrote:
>>>>
>>>>> Ya I'm building with vtk.
>>>>>
>>>>> Regards,
>>>>> Satwik k
>>>>>
>>>>> On Nov 27, 2017 21:33, "David Gobbi" <david.gobbi at gmail.com> wrote:
>>>>>
>>>>>> How were you building vtkDICOM?  Were you building it with VTK as a
>>>>>> VTK module (with Module_vtkDICOM=ON), or were you building vtkDICOM by
>>>>>> itself?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sun, Nov 26, 2017 at 11:12 PM, Satwik <satwik.k8 at gmail.com> wrote:
>>>>>>
>>>>>>> Hi users,
>>>>>>>
>>>>>>> How can i make CT gantry tilt correction using vtk.
>>>>>>>
>>>>>>> I tried using vtkDICOMCTRectifier, but i was not able to compile
>>>>>>> vtkDICOM
>>>>>>> module.
>>>>>>> ERROR: can't able to find vtkDICOMModule.h.
>>>>>>>
>>>>>>> Regards,
>>>>>>> Satwik k
>>>>>>>
>>>>>>
>>>>
>>
>
>
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