[Insight-users] ITK 3.12 : Scheduled for Feb 28 2009

[Luis Ibanez]

Hi Ivan,

Thanks for pointing this out,
and thanks for sharing your images.


As described in the bug report, the offending code is in the
ImageFileReader.

We are looking at options that would result in a reasonable
behavior.

The challenge is that:


    a) When reading 3D Direction cosines into a 2D image,
       we only keep a 2x2 matrix. This matrix doesn't really
       map to 3D space

    b) The current code manually modify the matrices to
       satisfy the restrictions of the Analyze file format,
       but it doesn't address all the cases

    c) The naive solution of setting the directions to an
       identiy will result in an orientation that is not
       supported by Analyze.


We are looking into this...


    Thanks


       Luis


------------------
Ivan Macia wrote:
> Hi Luis, all,
> 
> I dont know if this could be an outstanding issue or we are doing 
> something wrong but for us it is. Since version ITK-3.10 and on, we are 
> not able to load ANY coronal or sagittal slice with a simple 
> itk::ImageFileReader for a 2D image. An exception is always thrown in 
> itk::ImageBase::ComputeIndexToPhysicalPointMatrices() complaining about 
> the direction matrix being singular. This prevents us to switch to 
> ITK-3.10 or future ITK-3.12 since our ITK-based software stopped working 
> correctly.
> 
> This was posted in the developers list some time ago but unfortunately 
> got no answer this time :(
> See detailed description here.
> 
> http://public.kitware.com/Bug/view.php?id=8470
> 
> Can anyone please try to reproduce this error? You may used attached 
> Dicom files to this email, one is coronal and one is sagittal. I tried 
> with ImageReadWrite example in ITK-3.10.1. This works in ITK-3.8.0.
> I have set ITK_USE_ORIENTED_IMAGE_DIRECTION ON in CMake, but I think 
> this should still work with this setting isn't it?
> 
> Thanks in advance for your help
> 
> Ivan
> 
> 
> 
> 2009/2/20 Luis Ibanez <luis.ibanez at kitware.com 
> <mailto:luis.ibanez at kitware.com>>
> 
> 
>     Just to let you know that the release of ITK 3.12
>     is scheduled for Feb 28.
> 
>     During the following week we will be cleaning up
>     the Dashboard.
> 
>     If you see any outstanding issue,
>     please let us know,
> 
> 
>      Thanks
> 
> 
>       Luis
> 
> 
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