[ITK] reading private tags returns weird strings

[Dženan Zukić]

Can you share (either with the list or just me) this DICOM image
(optionally anonymized) and a runnable example which you use to read it?

On Wed, Aug 10, 2016 at 10:41 AM, <Francois.GIRINON at ensam.eu> wrote:

> Le 10/08/2016 à 16:23, Dženan Zukić a écrit :
>
> Does Matlab have special support for those private tags? They may have
> special encoding besides base64 applied by ITK DICOM dictionary.
>
> On Wed, Aug 10, 2016 at 10:13 AM, <Francois.GIRINON at ensam.eu> wrote:
>
>> Le 10/08/2016 à 16:05, Dženan Zukić a écrit :
>>
>> In fact, this decodes
>> <http://www.opinionatedgeek.com/dotnet/tools/base64decode/> to 00 80 93
>> 43 - four bytes given here in hexadecimal notation. The decoder you linked
>> does not seem to work correctly. I don't know why you expect 295 there.
>>
>> On Wed, Aug 10, 2016 at 9:58 AM, <Francois.GIRINON at ensam.eu> wrote:
>>
>>> Le 10/08/2016 à 14:35, Dženan Zukić a écrit :
>>>
>>> Hi Francois,
>>>
>>> is this base64 encoded? You should perhaps do base64 decode on the
>>> return string to get the binary value.
>>>
>>> Regards,
>>> Dženan
>>>
>>> On Wed, Aug 10, 2016 at 7:15 AM, <Francois.GIRINON at ensam.eu> wrote:
>>>
>>>> Hi,
>>>>
>>>> I'm trying to read private dicom tags using :
>>>>
>>>>     ImageIOType::Pointer dicomIO = ImageIOType::New();
>>>>     ...
>>>>     dicomIO->SetLoadPrivateTags(true);
>>>>     std::string offsetFromBottomStr;
>>>>
>>>>     std::string offsetFromBottom = "0863|1041";
>>>>     dicomIO->GetValueFromTag(offsetFromBottom, offsetFromBottomStr);
>>>>
>>>> The value *offsetFromBottomStr *returned is *AICTQw==*
>>>> How does it come and how can I fix this ?
>>>>
>>>> Thank you,
>>>> François.
>>>>
>>>> _______________________________________________
>>>> Community mailing list
>>>> Community at itk.org
>>>> http://public.kitware.com/mailman/listinfo/community
>>>>
>>>>
>>> Thanks for your answer. You might be right, they say here
>>> <http://public.kitware.com/pipermail/community/2016-May/011426.html>
>>> *private tags and encodes the with Base64 into strings. *Unfortunately, *AICTQw==
>>> *should correspond to 295 and according to https://www.base64decode.org/,
>>> *AICTQw==* is a C.
>>> Besides, I don't understand how does itksysBase64_Decode works (I'm not
>>> sure I should use this method too).
>>>
>>
>> In fact I have previously red the dicom using matlab and the value of the
>> private tag 0863 1041 is 295.
>>
>
> I don't know, it doesn't seem really matlab specific, this tool
> <https://github.com/gerddie/ginkgocadx> also gets a dicom inspector
> module which displays 295.
>
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