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Question on IOD Modules

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Subject: Question on IOD Modules
From: michael.ventresca@veeva.com (Michael Ventresca)
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by: Michael Ventresca - Tue, 19 Sep 2023 18:28 UTC

Hi all,

In the standards, there are Mandatory, Conditional and User Option Modules.

For Conditional and User Option Modules, does this imply that even though these Modules have Type 1 attributes, these attributes may not appear in the file because the module is either optional or conditional?

For example, the CT module has the Clinical Trial Study Module = U. In this module there are type 1 attributes. Since this module is User optional, this module, meaning all attributes within this module, may not appear within the file and the file is still conformant?

Thank you

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Subject: Re: Question on IOD Modules
From: dclunie@dclunie.com (David Clunie)
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by: David Clunie - Tue, 19 Sep 2023 20:34 UTC

Hi Michael

If a Module is Type U, then the module (i.e., any of its Attributes) does not need to be present, even if some of its Attributes are Type 1.

However, if the Module "is present", then all of its Type 1 and 2 (and 1C and 2C if condition is satisfied) Attributes shall be present.

This begs the question of how one determines that a Type U Module "is present" - I generally consider a Module present if any of its Attributes are present (regardless of their Type), though I can sometimes be convinced that it is is only absolutely definitely present if its mandatory (or condition satisfied) Attributes are present (and sometimes take that lazy approach); one might consider modulating this approach if the same Attribute is present for multiple Modules in the same IOD. I don't guarantee that tools like dciodvfy in my dicom3tools are entirely consistent in this respect.

David

On Tuesday, September 19, 2023 at 2:28:54 PM UTC-4, Michael Ventresca wrote:
> Hi all,
>
> In the standards, there are Mandatory, Conditional and User Option Modules.
>
> For Conditional and User Option Modules, does this imply that even though these Modules have Type 1 attributes, these attributes may not appear in the file because the module is either optional or conditional?
>
> For example, the CT module has the Clinical Trial Study Module = U. In this module there are type 1 attributes. Since this module is User optional, this module, meaning all attributes within this module, may not appear within the file and the file is still conformant?
>
> Thank you

Subject	Author
Question on IOD Modules	Michael Ventresca
Question on IOD Modules	David Clunie