mapping modality from SOP Class uid

[jenny-hm-lee]

Hello,

Given an sop class uid, I know I can get the SOP Class Name using pynetdicom. Is it possible to get the modality associated with the SOP Class?

Apolgies if this is wrong channel for this question.

Jenny

[mrbean-bremen]

No, there is no direct connection between the SOP class and the modality in pydicom / pynetdicom. If you need this, you have to add such a mapping yourself.

[scaramallion]

If by "modality" you mean the service class from Part 4 then it is possible. Using pydicom's inbuilt Storage UIDs:

>>> from pydicom.uid import CTImageStorage
>>> from pynetdicom.sop_class import uid_to_service_class
>>> uid_to_service_class(CTImageStorage)
<class 'pynetdicom.service_class.StorageServiceClass'>

Or a str:

>>> uid_to_service_class("1.2.840.10008.5.1.4.31")
<class 'pynetdicom.service_class.BasicWorklistManagementServiceClass'>

Or using pynetdicom's inbuilt SOP Classes (which are a subclass of pydicom's UID class):

>>> from pynetdicom.sop_class import CTImageStorage
>>> CTImageStorage.service_class
<class 'pynetdicom.service_class.StorageServiceClass'>
>>> CTImageStorage.service_class.__name__.split(".")[-1]
'StorageServiceClass'

These return the service class object, but as demonstrated you can parse that for the service name.

Might be nice to add a name attribute to ServiceClass...

On the other hand, if you mean the (0008,0060) Modality value then no, that's not possible, but it should be easy enough to create a set of mappings as suggested by @mrbean-bremen

[jenny-hm-lee]

Thanks for the quick response. This is helpful.