Sort based on AE Title

[Tullhead]

I have 100 customers. I would like to give each one a unique "AE Title" that they should use when sending to my server. When my server receives a dicom file, I want to be able to tell which customer sent it by checking the AE Title that was used. How can I do this kind of thing with DCMTK? Is it possible with binaries, or would we have to modify code?

[Michael Onken]

Hi,

storescp (which can receive DICOM objects via C-STORE from clients) has an option which can be configured to do what you want:

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      Option --exec-on-reception allows one to execute a certain command line after having  received  and  processed
       one DICOM object (through a C-STORE-RQ message). The command line to be executed is passed to this option as a
       parameter. The specified command line may contain a number of placeholders which will be replaced at run time:

       • #p: complete path to the output directory into which the last DICOM object was stored  (not  available  with
         option --ignore though)
       • #f: filename of the current output file (not available with option --ignore though)
       • #a: calling application entity title of the peer Storage SCU
       • #c: called application entity title used by the peer Storage SCU to address storescp
       • #r: calling presentation address, i.e. hostname or IP address of the peer Storage SCU

as a parameter you give a command line command (e.g. your own little skript or just a "copy" (Windows) command) that than can use #a as a placeholder to refer to the calling ae title.

E.g. on Windows:

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storescp 1234 --exec-on-reception "rename #f #a_#f"

will store the file to something like STORESCU_CR.1.3.51.0.7.99.2155959091.26337.877613964.2 where STORESCU is the calling AE title, and CR... is the usual unique name, storescp invents for each incoming file.

BR,
Michael

[Tullhead]

Perhaps I am doing something wrong, but I cannot get this to work. I first tried with rename and #f and #a, but in trying to track down the problem, I simplified it all the way down to just trying to "create a directory", in case the issue had to do with substituting for #f and #a. So here is my simple test:

storescp.exe -xf C:/Epona/metsrv.txt Default -aet MY_AE -od C:/Epona/Listener 4082 -xcr "mkdir C:\Epona\Listener\foo" (this is printout of actual line in my log file)

The directory "foo" is not being created -- so I think the -xcr is just not working. What would cause it not to execute? The dicom file is being received and appearing in the "Listener" folder as expected.

Sorry, if I am doing something stupid. Can you spot the problem? Thanks!

[Tullhead]

Help!

[Michael Onken]

Hi Tullhead,

I tried this on Windows now and I also see a problem. The same thing on linux (with mv instead of rename) works. The interpretation of the quotes in the -xcr argument seems to be the problem. I have to look at this in the debugger to see whether there is an easy fix (I will do this but not today). Or there is a way to quote this differently in Windows that I don't know, maybe one of my colleagues.

BR,
Michael

[J. Riesmeier]

Did you already try to use a double backslash, i.e. "\\" instead of "\"?

[Michael Onken]

I tried it at least with commands that don't have special characters at all.

[Marco Eichelberg]

The issue on Windows may be caused by the fact that "mkdir" is an executable binary on Linux, but part of cmd.exe on Windows. Perhaps you might try to call

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storescp.exe -xf C:/Epona/metsrv.txt Default -aet MY_AE -od C:/Epona/Listener 4082 -xcr "cmd.exe /c mkdir C:\Epona\Listener\foo"

.

[Tullhead]

No, the "cmd.exe /c mkdir ..." also does not work. And during my original testing I tried various commands (ren, mv, etc). It simply seems that the -xcr does not execute (at least on windows).

I also took guesses at various quoting and escape sequences trying to find a way that would work -- some kind of work-around. Spent half a day doing that.

Really need this to work - I hope you can find a way...

Thanks again.

[Marco Eichelberg]

I just tried it with

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storescp -xcr "cmd.exe /c mkdir d:\test"

and it works for me. I am using the current DCMTK 3.6.7 on Windows 10, installed via Chocolatey.

[Tullhead]

Aha! Indeed, using the form: "cmd.exe /c mkdir d:\test" works!

Thanks for that.