Code Extension

[Mariusz Kowalski]

Hi,

I need to test some DICOM files with Japanese characters where code extension is used.

Is fo-dicom doesn't support such cases or do I do something wrong?

I've attached some sample file:

Specific Character Set (0008,0005) \ISO 2022 IR 13\ISO 2022 IR 87

When I open it with DICOM Dump tags where Japanese characters are used are wrong:

Patient's Name, Patient ID, Patient Comments, Additional Patient History

How can I fix it myself or maybe it will be fixed with next release?

Thanks,

Mariusz

[Anders Gustafsson Cureos AB]

Many thanks for reporting this issue. I have created a Github issue #43 here. It would be great if we could continue the discussion on this topic on Github.

Best regards,

Anders @ Cureos

[Anders Gustafsson Cureos AB]

Mariusz,

I have published an update on the Github Issues page, please have a look here: https://github.com/fo-dicom/fo-dicom/issues/43

Regards,

Anders @ Cureos

[Mariusz Kowalski]

Anders,

Thank you for dealing with this issue.

I think that using backslash at the beginning of Specific Character Set  is correct. I search a little and here are some examples:

http://www.manualslib.com/manual/24431/Canon-Cr-1-Mark-Ii.html?page=84

http://medical.nema.org/dicom/2013/output/chtml/part05/sect_H.3.html

https://www.dabsoft.ch/dicom/5/6.1/

I think that it is wrong behavior that fo-dicom uses only one (first) encoding because (if I understand this mechanism clearly) in case of Code Extension there are some escape characters in strings which should invoke switching of encoding.

Next thing is that when i remove backslash from the beginning of Specific Character Set fo-dicom still display some of tags incorrect:

Thanks,

Mariusz

[Anders Gustafsson Cureos AB]

Many thanks for those links, Mariusz. You are right, I stand corrected :-)

Currently, fo-dicom does not support code extension techniques, but of course it should. I will post a Github issue regarding this. As far as I can tell, it is quite a large task to implement though, so it will have to wait until after the version 1.1.0 of fo-dicom that we are about to release shortly.

As an additional help, Mariusz, could you please also display the correct values of the tags above?

Best regards,

Anders

PS. For reference, I will twin-post yours and my response on Github. I hope you don't mind. It would also simplify future reference for the development if you could post subsequent responses on Github. Thanks in advance!

[Mariusz Kowalski]

Correct values:

Patient's Name: ??^??=漢字^表意=かな^ひょうおん

Patient ID: @DM_Cod11_ﾏﾀﾞﾀﾛｳ

Patient Comments: YamadaTarou山田太郎ﾔﾏﾀﾞﾀﾛｳ

Additional Patient History: YamadaTarou山田太郎ﾔﾏﾀﾞﾀﾛｳ

Thanks for your effort, Anders.

Regards,

Mariusz