[Loris-dev] Different StudyInstanceUIDs

[Nicolas Brossard]

Hi Alfredo,

I am afraid what I said earlier was not 100% correct: each
SerieInstanceUID/echo time combo has to be unique. So yeah, you could have
two DICOM files associated with different modalities that have identical
SeriesInstanceUIDs (in that case though, it is expected that the echo times
will be different). I am guessing the studies you are referring to in your
email fit that requirement, right?

Apologies for the confusion.


Best,
Nicolas


On Fri, Sep 25, 2020 at 4:29 PM Morales Pinzon, Alfredo <
AMORALESPINZON at bwh.harvard.edu> wrote:

> Hi Nicolas,
>
> We are working on this issue but a question. Sometimes studies have dual
> echo and dynamic sequences (e.g., a dual-echo PD/T2 sequence produces a
> PD-weighted image and a T2-weighted image together) that result in in two
> sequences sharing the same “ SeriesInstanceUID”. This seems to be quite
> common, don’t you have a workaround already available in LORIS?
>
> Best,
> Alfredo.
>
> On May 4, 2020, at 8:50 AM, Morales Pinzon, Alfredo <
> AMORALESPINZON at BWH.HARVARD.EDU> wrote:
>
> Hi Nicolas,
>
> Thank you for your answer. We’ll handle these cases based on LORIS
> requirements.
>
> Best,
> Alfredo.
>
> On May 1, 2020, at 1:39 PM, Nicolas Brossard <
> nicolasbrossard.mni at gmail.com> wrote:
>
>         External Email - Use Caution
>
> Hi Alfredo,
>
> You cannot insert in the database a scan archive containing two different
> study UIDs: all the scans inside the archive must have the same study UID,
> that's a LORIS requirement. I suggest you split your original archive into
> two archives, based on their study UIDs, and then upload/insert both. You
> could also "hack" you original archive so that all study UIDs are identical
> but I am not a big fan of this strategy since you are altering the original
> data you got from the scanner...
>
>
> Best,
> Nicolas
>
> p.s: if you are not comfortable splitting archives, I can help
>
> On Fri, May 1, 2020 at 11:03 AM Morales Pinzon, Alfredo <
> AMORALESPINZON at bwh.harvard.edu> wrote:
>
>> Dear LORIS-Dev Team,
>>
>> In the IPMSA project some scans have acquisitions with two different StudyInstanceUIDs.
>> This leads to an error in the insertion pipeline. The reason for having two
>> different StudyInstanceUIDs is because some acquisitions failed QC and
>> were re-acquired and added to the same study but with a different StudyInstanceUIDs. Here
>> are our questions:
>>
>> 1. Would it be possible to insert a study having acquisitions with
>> two different StudyInstanceUIDs?
>>
>> 2. If we were to change the StudyInstanceUIDs to have only one in a
>> study, would LORIS insert they study with acquisitions having different
>> scan date?
>>
>> Thank you for your help.
>>
>> Regards,
>> Alfredo.
>>
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