how to differentiate images from one patient?

[flo]

Hi,

when ich have a MRT-image and and CT-image of one patient, how can I differentiate these pictures with the DICOM-Standard ( witch query parameter is that? )
Does the DICOM-tags have an element to differentiate ?
Or is that solved by study-ID ?

greetings flo

[flo]

SOPInstanceUID ???

thx flo

[focus]

You can use the Study UID. Study ID can be repeated, but the Study UID of a study it's supposed that is unique in the world,

[focus]

SopInsUID it's a identifier unique for each image, diferent images oft the same study has differents SopInsUID, you have to use StudyUID

Code: Select all

  DCM_StudyInstanceUID                     DcmTagKey(0x0020, 0x000d)

[gnchen]

You might want to check modality tag (0008, 0060)

[Marco Eichelberg]

Here's a short summary.

• If two DICOM images have the same SOP Instance UID, they are by definition identical.
• If two images have the same Modality code, they have been produced by the same modality. This can be used, e.g. to distinguish between CT and MR even in the case of secondary images (secondary capture images containing the "CT" or "MR" modality code).
• Study is not a reliable means of keeping images of different modalities or acquisitions apart because a study can contain objects from different modalities.
• All images of one series (sharing the same Series Instance UID) however, are guaranteed to be of the same modality.
• Both Modality and Series Instance UID are standard query keys on series level. This means, for a given patient you will first have to locate all studies and then issue repeated queries for each study to identify the desired series properties.