Sorry for disturbing. Actually I used Osirix and solved the problem very easily. If you are a Mac user, I strongly recommend it in such a situation. 

Best,

Necip

The simple solution (without advanced software): first step is get a dcm4che software (is free). Then you can use dcm2xml script to extract image/video (binary data). Then you can change (compress or anything you want) image/video/binary data, and after that put this data back to dicom file (by xml2dcm script).

Also many other software (include free software like ImageJ) can read and save dicom file.

I use dcmdjpeg from dcmtk (http://support.dcmtk.org/docs/dcmdjpeg.html).

This is a command-line tool to decompress files from the dos-prompt.

You can also use this tool in batch-scripts. I use this in a batch_analyser tool in ImageJ (not publicly available): the tool searches for all files in a directory, the user can select the files to be decompressed in the UI, and then the tool directs dcmdjpeg to decompress these files.

Frank

Thank you very much Frank!

For what it's worth, this tool worked for me:

http://gdcm.sourceforge.net/html/gdcmconv.html

Just use the --raw option.

Necip, can you help me figure out how to uncompress dicoms in Osirix? Or any other (free) program for that matter! I am able to uncompress the dicoms but they are half the size (500kb vs 1mb). I know I was able to get them at full size YEARS ago, but unfortunately didn't write my methods down...thanks for any help.

You can try loading into our free ProSurgical3D software:

https://www.stratovan.com/products/pro-surgical-3d?utm_source=rgps3d&utm_medium=ans&utm_campaign=exp1

Once loaded, you can then export the scan back out back into DICOM which should be uncompressed. Let me know if you have any problems.

Dear David Wiley, I have same problem with Necip Capraz and followed your suggestion. The software ProSurgical3D worked perfect and now I got non-compressed DICOM data. It is amazing! Thank you for your information and thank you Necip Capraz as well uploading your question. q(^-^)/

David Wiley I am struggling to find a download link. I created an account and went to the applications page, yet I could not seem to download the software. Thank you for your help and recommendation.

iyi günler necip hocam .sıkıştırılmış dicom dosyasını imagej de açamıyorum .Nasıl yapabilirim yardımcı olursanız çok mutlu olurum.