Dealing with multi-frame images

[Greg Silverman]

Dear all,

I have an application where I need to move multi-frame images from dcm4chee to this application, so that I can create an AVI of the image sequence. For ECHO and cardiac ultrasound, multiframe images are are relatively small in size and thus contained within a single file, and I have absolutely no problem dealing with these in my conversion app. On the other end of the spectrum, the CT and MRI examples I have been working with have hundreds of frames, with each frame as a single file within a directory structure. These multi-frame  cine-loops play just fine in a DICOM viewer, but when I try exporting the directory of images to my external app, I am unable to get the correct format to create an AVI. I was wondering if any of the dcm4che2/3 tools would help me to collapse the directory of files all into a single DICOM file? I was Googling about on this and believe I need to deal with the SOP and IOD to get this to work correctly.

Please feel free to correct any of my assumptions, but I have to admit that I am in the process of teaching myself the DICOM standard.

Thanks very much in advance!

Greg--

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Greg M. Silverman

Senior Developer Analyst

Cardiovascular Informatics 

University of Minnesota

[Suresh Viswanathan]

Multi-frame CT & MR is part of the Enhanced DICOM Object. In theory you could write a convertor to take the all the instances from a study and convert it into single multi-frame file.

Have you tried using FFMPEG to create a video from multiple files?

Suresh.

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[Greg Silverman]

Suresh, 

Thanks for the pointer. I'll take look at FFMPEG.

Greg--

[Greg Silverman]

Founds this: https://github.com/dcm4che/dcm4che/blob/master/dcm4che-tool/dcm4che-tool-emf2sf/README.md, which should allow me script out this process.

Greg--

[Suresh Viswanathan]

Sent from my iPhone

[Suresh Viswanathan]

Looks like it converts from Multiframe Enhanced DICOM Object to multiple single instance files and not vice versa which you need.

Suresh. 

Sent from my iPhone

On 08-Oct-2013, at 1:15, Greg Silverman <g...@umn.edu> wrote:

[Greg Silverman]

I noticed that right after I posted this. It is possible that http://gdcm.sourceforge.net/wiki/index.php/Gdcmtar might work (someone in the dicom group pointed me to this). I'll test it out and report the results.

Thanks!

Greg--

[Greg Silverman]

FYI,  I had success with the dcmulti utility in dicom3tools. I have to do some more testing, but at least I was able to achieve the first step in this.

Greg--