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I want to upload .dcm image format file into Drupal7 article, but it's not allowed.
Suggestions about how to get this to work?
Unfortunately, it is not possible to allow image extension that cannot commonly displayed by a browser. You would have to use a filefield instead.
This has been discussed at:
And for D6 at:
You can set allowed file types at the field settings page of that image field.
Go to admin/structure/types/manage/article/fields/field_image and add the file extension to the comma separated list of allowed file types.
Required, but never shown