DICOM private fields not written correctly with custom dicomdict

I've created a dicom dict text file that contains (among other things) a floating point private tag (9003,1038).

>> current_dicom_dict = dicomdict('get_current')
current_dicom_dict =
  '/Users/brian/apps/copilot/share/dicom-dict-cp.txt'

>> !cat /Users/brian/apps/copilot/share/dicom-dict-cp.txt | tail -n 1
  (9003,1038) FL  DaysSincePriorStudy  1

The value of this tag is correctly set in the metadata struct:

>> metadata_out.Private_9003_1038
ans =
  single
  24.3231

I write the file with DICOMWRITE and read the file metadata back in with DICOMINFO:

dicomwrite(dat, 'test.dcm', metadata_out, 'CreateMode', 'copy', 'WritePrivate', 1);
metadata_in = dicominfo('test.dcm');

The metadata that I read back in failed to parse the private field correctly:

>> metadata_in.Private_9003_1038

ans =

    4×1 uint8 column vector

     176
     149
     194
     65

Why is my private field not parsed correctly by DICOMINFO?

Answer 1

[Jayanti]

Hi Brian,

It looks like the issue might be due to the fact that "dicominfo" is not using your custom DICOM dictionary when reading the file back.

So before calling "dicominfo", set your custom dictionary like below:

dicomdict('set', current_dicom_dict);

For more details please refer to the below offical documentation link on "dicomdict":

https://www.mathworks.com/help/images/ref/dicomdict.html