[ITK-users] question about wiki example ResampleDICOM

[Bill Lorensen]

I wrote this example many years ago…
1) If the input has a non-trivial slope/intercept, the reader applies
the slope/intercept to the raw data.
2) Rather than setting the slope/intercept in the output dicom, I
apply the inverse of of the slope intercept to the resampled data
before writing. The output dicom should not have the origin
slope/intercept tags.

I'll try to verify this with Slicer, but I may be out of touch for 2 weeks…

Bill


On Wed, Sep 17, 2014 at 10:15 AM, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
> Hi Nick,
>
> I can confirm that with the example I get a difference of -1024 (+/- 1) in
> between the input and the output, using the ShiftScaleImage part...
> While without this part of code the difference is (+/-1)
>
> I would like to make sure this is the expected behaviour!?
>
> On Wed, Sep 17, 2014 at 3:35 PM, Nick Patterson <pattersonnp.work at gmail.com>
> wrote:
>>
>> OK, I will wait to hear the outcome of your run with the original example
>> then.
>>
>> Cheers, Nick.
>>
>>
>>
>>
>> On 17 Sep 2014, at 14:34, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
>>
>> Nick,
>>
>> I can't roll back to previous ITK version, important patches on
>> itkGDCMImageIO were very recently merged...
>>
>>
>> https://github.com/Kitware/ITK/commits/master/Modules/IO/GDCM/src/itkGDCMImageIO.cxx
>>
>> e.g.
>>
>>
>> https://github.com/Kitware/ITK/commit/33a7e7162fc040f6c7346af5fc1ec15a80834273
>>
>> https://github.com/Kitware/ITK/commit/2f86b89df192aa80793b2d7f09624a2e4a74ec3c
>>
>>
>> Arnaud
>>
>> On Wed, Sep 17, 2014 at 3:29 PM, Nick Patterson
>> <pattersonnp.work at gmail.com> wrote:
>>>
>>> I should also mention Arnauld that I use ITK4.5.2.  I have had many
>>> issues with using ITK 4.6 with the latest GDCM from git, so rolled back to
>>> ITK4.5.2.
>>> Nick.
>>>
>>>
>>>
>>> On 17 Sep 2014, at 14:32, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
>>>
>>> Hi Matias,
>>>
>>> I guess you are referring to
>>>
>>>
>>> https://github.com/Kitware/ITK/commit/847ec2b79ac2cedaab6714678c0677793aa23a1e
>>>
>>> $ git tag --contains 847ec2b79ac2cedaab6714678c0677793aa23a1e
>>> v4.6.0
>>>
>>> I use the release branch of ITK
>>>
>>> ---
>>>
>>> Matt,
>>>
>>> Can you comment on this, please?
>>>
>>> Thanks
>>> Arnaud
>>>
>>> On Sep 17, 2014, at 3:21 PM, Matias Montroull <matimontg at gmail.com>
>>> wrote:
>>>
>>> I had an issue with the resampledicom example once (all my pixel values
>>> were recalculated by adding rescaleintercept) and then downloaded the latest
>>> ITK release (4.6) and worked fine.
>>>
>>> The issue was with the GDCMIO class I beleive but was fixed somehow in
>>> the 4.6 version.
>>>
>>> On Wed, Sep 17, 2014 at 10:02 AM, Arnaud Gelas <arnaudgelas at gmail.com>
>>> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> I have been looking at the following wiki example:
>>>>
>>>> http://www.itk.org/Wiki/ITK/Examples/DICOM/ResampleDICOM
>>>>
>>>> It seems to me that the section to rescale the image is not valid
>>>> anymore with latest ITK version (?)
>>>>
>>>>
>>>> https://github.com/InsightSoftwareConsortium/ITKWikiExamples/blob/master/DICOM/ResampleDICOM.cxx#L314-L333
>>>>
>>>> Can anyone confirm?
>>>>
>>>> Is this code validated? are output images compared to input ones in the
>>>> corresponding test?
>>>>
>>>> Thanks
>>>> Arnaud
>>>>
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>>>
>>>
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>>
>>
>
>
> _____________________________________
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>
> Visit other Kitware open-source projects at
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>
> Kitware offers ITK Training Courses, for more information visit:
> http://www.kitware.com/products/protraining.php
>
> Please keep messages on-topic and check the ITK FAQ at:
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