to_json omits file metadata

[larry0161]

Hello,

I am trying to save all the tags of a DICOM file into a json string. However, I noticed that the metadata field is omitted when I use to_json. Is there a way to get the all tags including the metadata fields into a json string? Thanks!

[mrbean-bremen]

The metadata is just another dataset that can be accessed via ds.file_meta, so you can also call to_json on it, though as this does not belong to the actual dataset, it is not serialized as json as defined in the DICOM standard.

If you need it anyway, you could just create a dataset that also contains the metadata, and serialize this:

ds = dcmread(...)
ds_all = copy.deepcopy(ds)
ds_all.update(ds.file_meta)
json_rep = ds_all.to_json())