dicomwrite - assign VR to WaveformData

Dear,

I need to create a dicom file (say 'test.dcm') which borrows the metadata from another dicom file (say 'template.dcm'). My problem is that dicomwrite modifies the VR of the tag WaveformData from OB to OW.

This is a problem because I need to upload the new dicom in a commercial software which requires a VR of OB.

For instance: if I do:

X = dicomread('template.dcm');

info = dicominfo('template.dcm');

dicomwrite(X,'test.dcm',info,'CreateMode','Copy')

then, the output of

dicomdisp('template.dcm')

is:

0004204    2   (5400,1010) *OB*      19660 bytes - WaveformData

while the output of

dicomdisp('test.dcm')

is:

0004070    2   (5400,1010) *OW*      19660 bytes - WaveformData

Connected to this, I also noticed that in 'template.dcm' it is WaveformData: [9830x1 uint16]

While, in 'test.dcm', it becomes: WaveformData: [19660x1 uint8]

is there a way to avoid this change of format? I tried to play around with the 'TransferSyntax' and 'VR' options but with not success.

Thank you in advance

Martino.