Are there any working examples for how to use DicomDirectory?

[Chris Horn]

The code seems to have changed since hdesouky's example was posted, is there an updated sample?

[Chris Horn]

on further investigation it seems that DicomDir support was broken on 22/12/2012 "make DicomDirectory.Open() methods consistent with DicomFile"

					_directoryRecordSequence = Dataset.Get<DicomSequence>(DicomTag.DirectoryRecordSequence);

					RootDirectoryRecord = dirObserver.BuildDirectoryRecords();

without these 2 lines RootDirectoryRecord is always null? and loading fails, unless I'm missing something (and it wouldn't be the first time).

can some one point me in the right direction

[Colby Dillion]

I've updated the code to fix the broken Open() methods and have included the DICOM Media example project:

https://github.com/rcd/fo-dicom/blob/master/Examples/DICOM%20Media/Program.cs

[MENG HO]

Sorry, the probelm I have is different. I am new to DICOOM.

I try to get the value from Dicom RT file. For example, I want to get the the value for tag (0001, 0002) which is under (0001,0001) and also tag (0001, 0002) may not be the single one which may like:

(0001,0001){0}(0001,0002){0}

(0001,0001){0}(0001,0002){1}

(0001,0001){0}(0001,0002){2}

 

If I use var value = dcm.Dataset.Get<string>(new DicomTag(0X0001,0X0002)); 

or var value = dcm.Dataset.Get<string>(DicomTag.tagname);

It return as null.

How can I get the value by using this or I have to try other way for this structure?

 

[Hesham Desouky]

0001,group not stored in Dataset, it is stored in the metadata of the DICOM file

[MENG HO]

Thanks, Hesham. So how can I use metadata to read the value of the tag?

 

[Chris Horn]

There are some issues, that I have not yet been able to figure out, however this solution does not seem to function as well as the clearcanvas class's did with mdcm, I have entire DICOMDIR's that fail to open, yet work fine in cc, cc/mdcm hybread and leadtools, time permitting I might try and and spend some serious time looking into this

[Hesham Desouky]

could you please post the DICOMDIR file with problem to investigate

[Chris Horn]

Hi Hesham,

Attached are 3 files a pic illustrating the problem, the DICOMDIR in question, and a zipped solution showing the mdcm/clearcanvas solution that currently works ( shown in the left of the attached pic)

[Hesham Desouky]

Hi Chris,

 

This was a bug in DicomDirectoryReaderObserver due to presence of Image icon sequence.

 

to solve this temporarily modify the DicomDirectoryReaderObserver.OnEndSequence() to:

 

public void OnEndSequence()
{
    _currentSequenceTag.Pop();
}

I will pull a fix to Colby's master branch tomorrow.

[Hesham Desouky]

I Pulled the request

[Chris Horn]

Awesome Hesham, thanks for the quick fix :) I haven't had a change to look into this any further yet and it looks like yo saved me the time