[Insight-users] DICOMWriter for wide dynamic intensity range

[Bill Lorensen]

I have an outstanding bug request that deals with similar issues. I hope to
get to it soon...
https://issues.itk.org/jira/browse/ITK-3194



On Wed, Aug 21, 2013 at 9:38 AM, Li, Wen <WLi at childrensnational.org> wrote:

>  Only ITK in Debug mode allows manipulating RescaleIntercept and
> RescaleSlope AND if output pixel type of the dicom writer is float or
> double. That's fine.
>
>  Now the problem is gdcm::Rescaler may not work correctly. It stopped at
> gdcmRescaler::InverseRescaleFunction without finishing it.
>
>  I suppose that function handles inverse rescaling for float input pixel
> type. I don't expect anyone to look into that problem for me but just a
> little frustrated.
>
>  Wen
>  ------------------------------
> *From:* insight-users-bounces at itk.org [insight-users-bounces at itk.org] on
> behalf of Li, Wen [WLi at childrensnational.org]
> *Sent:* Monday, August 19, 2013 11:24 PM
> *To:* insight-users at itk.org
> *Subject:* [Insight-users] DICOMWriter for wide dynamic intensity range
>
>   Hi Insight users,
>
>  I am talking about PET images. The data I am dealing with has a wide
> dynamic intensity range.
> Now I am trying to write it as a DICOM image.
>
>  As we all know, DICOM only stores 16bit integer as pixel value. I tried
> to manipulate DICOM tag 0028|1052 and 0028|1053 for the RescaleIntercept
> and RescaleSlope. Failed. They were always reset to be 0 and 1.
>
>  Is there any suggestion about how to store the original intensity values
> instead of having them chopped off to be 16bit integer. In my case, I
> probably need float non-1 RescaleSlope.
>
>  BTW, I define my writer as
> typedef itk::ImageSeriesWriter< OutputImageType, OutputImageType2D >
> SeriesWriterType;
> OutputImageType::PixelType is float and OutputImageType2D::PixelType is
> signed short.
>
>  Thanks,
> Wen
>
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