imagej problem with window width and level of dicom-files

[Hollebolle]

ImageJ does not properly show my CR DICOM-files. Window width and level values are 2800 and 1600, but then the image is displayed completely white. Something is wrongly interpreted by ImageJ, because when I open that dicom file with eFilm or Sante DICOM-Viewer the image is displayed with width=2800 and center (level)=1600 absolutely correctly.

Please open this dicom-file with ImageJ: http://www.oliver-lazar.de/dicom/IM000000.dcm

Try to adjust window width and level values. That is not working right.

Has anybody an idea?

kind regards

[ctrueden]

Hi Hollebolle,

It works fine with the Bio-Formats Importer with the "Autoscale" box
checked. It also looks fine when opened by ImageJ's built-in DICOM support
after choosing Image > Adjust > Brightness/Contrast and clicking "Auto."

-Curtis

On Fri, Nov 6, 2009 at 10:26 AM, Hollebolle <[hidden email]> wrote:

> ImageJ does not properly show my CR DICOM-files. Window width and level
> values are 2800 and 1600, but then the image is displayed completely white.
> Something is wrongly interpreted by ImageJ, because when I open that dicom
> file with eFilm or Sante DICOM-Viewer the image is displayed with
> width=2800
> and center (level)=1600 absolutely correctly.
>
> Please open this dicom-file with ImageJ:
> http://www.oliver-lazar.de/dicom/IM000000.dcm
> http://www.oliver-lazar.de/dicom/IM000000.dcm
>
> Try to adjust window width and level values. That is not working right.
>
> Has anybody an idea?
>
> kind regards
> --
> View this message in context:
> http://n2.nabble.com/imagej-problem-with-window-width-and-level-of-dicom-files-tp3959732p3959732.html
> Sent from the ImageJ mailing list archive at Nabble.com.
>

[Wayne Rasband]

 > ImageJ does not properly show my CR DICOM-files. Window
 > width and level values are 2800 and 1600, but then the
 > image is displayed completely white. Something is wrongly
 > interpreted by ImageJ, because when I open that dicom file
 > with eFilm or Sante DICOM-Viewer the image is displayed
 > with width=2800 and center (level)=1600 absolutely
 > correctly.
 >
 > Please open this dicom-file with ImageJ:
 > http://www.oliver-lazar.de/dicom/IM000000.dcm
 >
 > Try to adjust window width and level values. That is not
 > working right.

The v1.43k8 daily build opens this DICOM correctly. You can upgrade by
using the Help>Update ImageJ command and selecting "daily build" from
the drop down menu.

-wayne

[Hollebolle]

Hi Wayne,

thank You very much. That is working fine.

But I have developed my own solution based upon ImageJ Version 1.39 and cannot easily update on the newest version. Could You tell me, where I have to search for the problem (somewhere in ByteProcessor.java)? I know, a lot has changed until now, but maybe its just a small thing (hopefully).

best regards
Oliver

Wayne Rasband wrote

 > ImageJ does not properly show my CR DICOM-files. Window
 > width and level values are 2800 and 1600, but then the
 > image is displayed completely white. Something is wrongly
 > interpreted by ImageJ, because when I open that dicom file
 > with eFilm or Sante DICOM-Viewer the image is displayed
 > with width=2800 and center (level)=1600 absolutely
 > correctly.
 >
 > Please open this dicom-file with ImageJ:
 > http://www.oliver-lazar.de/dicom/IM000000.dcm
 >
 > Try to adjust window width and level values. That is not
 > working right.

The v1.43k8 daily build opens this DICOM correctly. You can upgrade by
using the Help>Update ImageJ command and selecting "daily build" from
the drop down menu.

-wayne

[Wayne Rasband]

On Nov 6, 2009, at 3:04 PM, Hollebolle wrote:

> Hi Wayne,
>
> thank You very much. That is working fine.
>
> But I have developed my own solution based upon ImageJ Version
> 1.39 and cannot easily update on the newest version. Could
> you tell me, where I have to search for the problem (somewhere
> in ByteProcessor.java)? I know, a lot has changed until now, but
> maybe its just a small thing (hopefully).

The fix is in the DICOM class. To see it:

   - go to the ImageJ website
   - click on "Developer Resources"
   - click on "Git Version Control Repository"
   - click on "commit" in the top line
   - click on "diff" in the line starting with "ij/plugin/DICOM.java"

-wayne

> Wayne Rasband wrote:
>>
>>> ImageJ does not properly show my CR DICOM-files. Window
>>> width and level values are 2800 and 1600, but then the
>>> image is displayed completely white. Something is wrongly
>>> interpreted by ImageJ, because when I open that dicom file
>>> with eFilm or Sante DICOM-Viewer the image is displayed
>>> with width=2800 and center (level)=1600 absolutely
>>> correctly.
>>>
>>> Please open this dicom-file with ImageJ:
>>> http://www.oliver-lazar.de/dicom/IM000000.dcm
>>>
>>> Try to adjust window width and level values. That is not
>>> working right.
>>
>> The v1.43k8 daily build opens this DICOM correctly. You can upgrade  
>> by
>> using the Help>Update ImageJ command and selecting "daily build" from
>> the drop down menu.
>>
>> -wayne
>>
>>
>
> --
> View this message in context: http://n2.nabble.com/imagej-problem-with-window-width-and-level-of-dicom-files-tp3959732p3960988.html
> Sent from the ImageJ mailing list archive at Nabble.com.