Christian Froeschlin <chr### [at] chrfrde> wrote:
> I had some CT scans taken this year due to medical issues
> and found the data could be provided on DVD on request ;)
>
> Images were in DICOM format and ImageMagick didn't like them,
> but they contained uncompressed 16 bit pixel data so conversion
> was mostly an issue of discarding the header and guessing width.
>
> This is a stack of 91 horizontal slices that were turned into
> a 3d pigment simply as a gradient of image_maps. This allows to
> render an arbitrary slice or texture an arbitrary shape, which
> is endless fun but doesn't provide too impressive images.
>
> So I turned the pigment into a function and rendered it as
> volumetric media, using a density color_map to enhance certain
> brightness ranges. This last one looks quite promising.

First, I really hope that the "possible problems" John mentioned are not to
serious. "Some CT" indicates a certain seriousness, I hope the best for you.

My first thought was, if it is more easy to convert the data to df3. I got the
impression that DICOM is not so far away from df3, after ripping off the
metadata. Seems to be big-endian too. May be one can exchange the headers of the
voxel bulk and get a df3 file. I don't know, only an idea.

The picture is fine but hard to interpret in some areas. If I look at the bottom
of the image I think I'm looking at your back in an upward direction. If I look
at the scapula and the clavicula only, I cannot tell apart what is in front and
what is back. Both are dominated by the green lung in large parts.

As you speak from publishing your data I can only remind you that DICOM files
contain medical metadata, which you will strip off first most likely. And
second, even the voxel data itself can reveal your disease to someone who is
able to read and visualise them properly. From your given image I cannot read
your disease but from detailed CT data may be... I only want to remind you of
that... If you will still do so: 1GB df3 files can be compressed to 3MB using
the highest compression rate with WinZip, so a DVD is not needed most likely.

Best regards,
Michael

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