[Insight-users] Image Intensities Changed During DICOM Read-Write-Read in ITK 3.20 vs. ITK 4.4.1

[Bill Lorensen]

Livia,

I think your diagnosis is probably correct. If the rescale slope is
nonzero, then the intensities may not be the same when written out with a
slope of 1. The itk reader always applies the slope and intercept when it
reads the data.

Bill


On Tue, Aug 13, 2013 at 10:27 AM, LiviaBarazzetti <barazzetti.livia at yahoo.it
> wrote:

> Hello,
>
> could it be that the original data has  Rescale Intercept (0028,1052) and
> Rescale slope (0028,1052) different from 0 and 1? I had problems with data
> which had a non integer value of rescale slope: the data was read correctly
> (the correct rescale slope was applied), but then it could not be written
> as
> dicom again with the original rescale slope but only with rescale slope=1 ,
> so the pixel value changed.
> In my case, anyway, the intensity of the resulting image was correct after
> being read as a dicom (the correct rescale was applied again)
>
> Best
> Livia
>
>
>
> --
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