Delete a line from DICOM?

I need to delete a few lines from some DICOM files. I can open up the file after I use dicominfo and find the line that I want gone and simply hit delete (or right click delete) and use dicomwrite to save the file. This works fine, but I would like to automate this process. Is there a way to code in to delete a line from a dicom file? For example:

aa = dicominfo('RS.dcm');
%I just want to delete:
aa.RTROIObservationsSequence.Item_3.Private_3773_3005

Sorry if this seems trival, I am relativly inexperienced with Matlab and can't seem to find any information relating to this.

Answer 1

[Tim]

I figured it out. Just needed to use rmfield to remove the line:

aa = dicominfo('RS.dcm');
aa.RTROIObservationsSequence.Item_3 = rmfield(aa.RTROIObservationsSequence.Item_3,'Private_3773_3005');

Pretty simple

Answer 2

[Walter Roberson]

DICOM files do not have "lines": they are often binary files that can contain blobs of binary data.

You should be able to use dicomread(), alter the values, and dicomwrite()

[Tim]

I understand how to alter values, I'm asking if there is a way to delete the value.