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devel / comp.protocols.dicom / Issue with dump2dcm and StudyInstanceUID, incorrect value specification

SubjectAuthor
* Issue with dump2dcm and StudyInstanceUID, incorrect value specificationStephen Douglas Scotti
`* Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specificationStephen Douglas Scotti
 `- Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specificationJörg Riesmeier

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Issue with dump2dcm and StudyInstanceUID, incorrect value specification

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Subject: Issue with dump2dcm and StudyInstanceUID, incorrect value specification
From: stephen.d.scotti@gmail.com (Stephen Douglas Scotti)
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 by: Stephen Douglas Scot - Mon, 21 Jun 2021 23:31 UTC

I am converting a .txt file version of a MWL file to a .wl file. It actually was all working until just recently, and not sure what broke the procedure. I am generating the .txt template in a python script and then converting the .txt file to a .wl file using dcmtk. It looks like the issue is related to the packing null byte at the end of the StudyinstanceUID.

Looks like I cannot attach a file, so I'm just pasting the offending tag in:

# Dicom-Data-Set
(0020,000d) UI [1.3.6.1.4.1.56016.0.1.1.44.1624317536] # StudyInstanceUID

vs.

# Dicom-Data-Set
(0020,000d) UI [1.3.6.1.4.1.56016.0.1.1.44.1624317536] # StudyInstanceUID

There should be a null byte at the end of the StudyInstanceUID in the first item.

If I execute:

dcmdump file.txt file.wl with the first set I get the incorrect value specification error, but no error, or just an assuming --write-xfer-little warning with the second. Not sure really what has changed.

Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specification

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Subject: Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specification
From: stephen.d.scotti@gmail.com (Stephen Douglas Scotti)
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 by: Stephen Douglas Scot - Mon, 21 Jun 2021 23:37 UTC

Actually, looks like maybe dcmtk dump2dcm adds the null byte automatically if it needs to ?

Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specification

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Subject: Re: Issue with dump2dcm and StudyInstanceUID, incorrect value specification
From: dicom@jriesmeier.com (Jörg Riesmeier)
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 by: Jörg Riesmeier - Tue, 22 Jun 2021 18:46 UTC

> Actually, looks like maybe dcmtk dump2dcm adds the null byte automatically if it needs to ?

Correct. dump2dcm adds a padding byte if needed. If you want to see the null byte, you could call dcmdump with option -dc (--disable-correction) and +Qo (--quote-as-octal). The latter is needed because a null byte is usually not displayed (invisible character).

Regards,
Jörg

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