It's quite hard. DICOM files don't have a standard header - they contain a variable amount of text at the beginning of the file. Usually, the software working with them recognizes the file only by extension.

I had to manage them once, and the only way I found feasible was to convert them to another format (high resolution JPB - it was ok for screening).
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>Seems interesting. I'll try to contact these persons. Maybe they've got something to offer..
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>Thanks.
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>Walter,