Iterating inside a sequence

[javier....@alma3d.com]

Hi All, 

I'm trying to read all occurrences from an element inside a sequence. After searching in this ggoogle group I wrote this code but I don't know how to carry on. Indeed I have that

(003a,0200) is a sequence that have n (003a,0208) sequences, and inside this, I want to read (0008,0100) value. To do this my code is like:

$CDSeq = $dicom->dataset_value( $WFitems, 0x003A, 0x0200);

$CDitems = $dicom->dataset_value( $CDSeq, 0xFFFE, 0xE000);

$CSSeq = $dicom->dataset_value( $CDitems, 0x003A, 0x0208);

$CSitems = $dicom->dataset_value( $CSSeq, 0xFFFE, 0xE000);

$value = $dicom->dataset_value( $CSitems, 0x0008, 0x0100);

At this point, I have the first  (0008,0100)  value, but I don't know the way to get (0008,0100) value from next (003a,0208) sequence.

Thanks for your help

[Nano.]

Hi Javier,

I don't have a correct answer at this point, but I will recommend you to take a look at this gist https://gist.github.com/nanodocumet/7034466 and also at the code of the dumper tool.

Certainly dealing with sequences is a weak point in Nanodicom.

If you have an anonymized sample dicom file I might be able to take a look of it.

Regards,

Nano.

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[javier....@alma3d.com]

Hi Nano,

thank you so much for answer me in a few time. As you can see, mi code is based on this https://gist.github.com/nanodocumet/7034466, but in this sample,

$seq is the first sequence with (0x0054, 0x0016) tag, but there's no sample to get the next sequence with the same tag. I've attached an anonymized dicom to show you my situation. 

In this file you can see something like this:

....

    (003a,0200) SQ (Sequence with undefined length #=12)    # u/l, 1 ChannelDefinitionSequence

      (fffe,e000) na (Item with undefined length #=10)        # u/l, 1 Item

        (003a,0208) SQ (Sequence with undefined length #=1)     # u/l, 1 ChannelSourceSequence

          (fffe,e000) na (Item with undefined length #=4)         # u/l, 1 Item

            (0008,0100) SH [5.6.3-9-1]                              #  10, 1 CodeValue

....

        (003a,0208) SQ (Sequence with undefined length #=1)     # u/l, 1 ChannelSourceSequence

          (fffe,e000) na (Item with undefined length #=4)         # u/l, 1 Item

            (0008,0100) SH [5.6.3-9-2]                              #  10, 1 CodeValue

...

so I just want to get all   (0008,0100) values, something like: "5.6.3-9-1", "5.6.3-9-2", "5.6.3-9-61", and so on.

[Nano.]

Hi Javier,

Thanks for the dicom file. It helped troubleshooting.

Take a look at this gist: https://gist.github.com/nanodocumet/9746854

You will need to download the latest version of the code: https://github.com/nanodocumet/Nanodicom

Hope that helps.

Thanks!

Nano.

[javier....@alma3d.com]

Hi Nano,

I get the latest version and it seems that everything works.

thank you so much,

Javier