Images from multiple modalities with the same StudyInstanceUID

[MasatoDicom]

Hello,
Is it possible to have the images obtained from different modalities
(CR,CT,MN etc) under the same study with the same StudyInstanceUID?
OfCourse, the SeriesInstanceUIDs are all different here.

For eg, if I create a screenshot data using one of series data and try
to upload that with the new modality(Secondary Capture); how should I
send the data to the Server? Should I make the StudyInstanceUID same
but SeriesInstanceUID different?

OR is it better to create a new StudyInstanceUID and SeriesInstanceUID
for the given patient?

Regards

[Peter B Schmidt]

Hello MasatoDicom,

MasatoDicom wrote:

> Is it possible to have the images obtained from different modalities
> (CR,CT,MN etc) under the same study with the same StudyInstanceUID?

No. Attribute (0008,0060) Modality is a Series Level Attribute (General
Series Module), it may not change inside one Series.

See Part 3 (PS3.3-2008) A.1.2.3 SERIES IE:

"The Series IE defines the Attributes that are used to group composite
instances into distinct logical sets.
Each series is associated with exactly one Study.
The following criteria group composite instances into a specific series:

a. All composite instances within a series must be of the same modality
[...]
"

> For eg, if I create a screenshot data using one of series data and try
> to upload that with the new modality(Secondary Capture); how should I
> send the data to the Server? Should I make the StudyInstanceUID same
> but SeriesInstanceUID different?

This is exactly the right way. Make it so ;o)

The Screenshot belongs to the same Study, which means, the same
diagnostic service episode and contributes to the findings - so it is
part of the same Study. The Modality is different, so it belongs into a
Series of its own.

Hope this helps,

Peter

[David Clunie]

Peter B Schmidt wrote:
> MasatoDicom wrote:
>
>> Is it possible to have the images obtained from different modalities
>> (CR,CT,MN etc) under the same study with the same StudyInstanceUID?
>
> No. Attribute (0008,0060) Modality is a Series Level Attribute (General
> Series Module), it may not change inside one Series.

You mean Yes; he asked about STUDY Instance UID, not Series.

As you describe later, this is exactly right, same Study, different
Series.

The reason is that Study is intended (for better or worse) to be
multi-modality, and not just because of screen shots; e.g., a single
requested procedure resulting in a single study may span different
acquisition modalities.

David

[Peter B Schmidt]

Hello David,

David Clunie wrote:
> Peter B Schmidt wrote:
>> MasatoDicom wrote:
>>
>>> Is it possible to have the images obtained from different modalities
>>> (CR,CT,MN etc) under the same study with the same StudyInstanceUID?
>> No. Attribute (0008,0060) Modality is a Series Level Attribute (General
>> Series Module), it may not change inside one Series.
>
> You mean Yes; he asked about STUDY Instance UID, not Series.

Oops, you are right again. He who reads may gain wisdom ... Sorry for
the mess, of course one may use the same Study Instance UID, but the
Series Instance UID has to be different for different Modalities.

Sorry for jumping the gun,

Peter

[MasatoDicom]

Hello,

I understand it now. Thanks for the reply.

Warm regards