H.4.2.2.3 N-DELETE
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##### H.4.2.2.3 N-DELETE

The N-DELETE is used to delete the last created Basic Film Box SOP Instance hierarchy. As a result all the information describing the last film is deleted.

The Basic Film Box SOP Instance hierarchy consists of one Basic Film Box SOP Instance, one or more Image Box SOP Instances, zero or more Basic Annotation Box SOP Instances, zero or more Presentation LUT SOP Instances, and zero or more Basic Print Image Overlay Box SOP instances.

### Note

There is no provision in the DICOM Standard to delete previously created Film Box SOP Instances.

###### H.4.2.2.3.1 Behavior

The SCU uses the N-DELETE to request the SCP to delete the Basic Film Box SOP Instance hierarchy. The SCU shall specify in the N-DELETE request primitive the SOP Instance UID of the last created Basic Film Box (root).

The SCP shall delete the specified SOP Instance hierarchy and shall remove the UID of the deleted Basic Film Box SOP Instance from the list of SOP Instance UIDs of the Film Box UIDs Attribute of the parent Basic Film Session SOP Instance.

The SCP shall return the status code of the requested SOP Instance hierarchy deletion. The meaning of success, warning, and failure status codes is defined in Section H.2.5.

The SCP shall not delete SOP Instances in the hierarchy as long as there are outstanding references to these SOP Instances

### Note

It is beyond the scope of the Standard to specify when the SCP actually deletes the Image SOP Instances with outstanding references.

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