| DICOM PS3.4 2024d - Service Class Specifications |
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The Basic Film Session IOD describes the presentation parameters that are common for all the films of a film session (e.g., number of films, film destination)
The Basic Film Session SOP Instance refers to one or more Basic Film Box SOP Instances.
The DIMSE Services applicable to the IOD are shown in Table H.4-1.
The meaning of the Usage SCU/SCP is described in Section H.2.4.
This Section describes the behavior of the DIMSE Services that are specific for this IOD. The general behavior of the DIMSE Services is specified in PS3.7.
The N-CREATE is used to create an instance of the Basic Film Session SOP Class.
The Attribute list of the N-CREATE is defined as shown in Table H.4-2.
The meaning of the Usage SCU/SCP is described in Section H.2.4.
Within the film session, the allocated memory is consumed as SOP Instances are created and is freed for reuse as SOP Instances are deleted. All the allocated memory shall be released following termination of the Association or deletion of the Film Session SOP Instance.
Table H.4.1.2.1.2-1 defines the specific Status Code values that may be returned in a N-CREATE or N-SET response for this SOP Class. See PS3.7 for additional response Status Codes of N-CREATE and N-SET DIMSE Services.
The SCU uses the N-CREATE to request the SCP to create a Basic Film Session SOP Instance. The SCU shall initialize Attributes of the SOP Class as specified in Section H.2.4.
The SCP shall create the SOP Instance and shall initialize Attributes of the SOP Class as specified in Section H.2.4.
The SCP shall return the Status Code of the requested SOP Instance creation. The meaning of success, warning, and Failure Status Codes is defined in Section H.2.5.
The Basic Film Session SOP Instances shall be created before the Film Box SOP Instances are created.
At any time the SCU/SCP shall only support one Basic Film Session SOP Instance on an Association.
Terminating the Association will effectively perform an N-DELETE on an opened film session. See Note in Section H.4.1.2.3.2.
The N-SET may be used to update an instance of the Basic Film Session SOP Class.
All Attributes and usage in Table H.4-2 apply to N-SET.
The status values that are specific for this SOP Class are defined in Section H.4.1.2.1.2.
The SCU uses the N-SET to request the SCP to update a Basic Film Session SOP Instance. The SCU shall specify the SOP Instance UID to be updated and shall specify the list of Attributes for which the Attribute Values are to be set.
The SCP shall set new values for the specified Attributes of the specified SOP Instance.
The SCP shall return the Status Code of the requested SOP Instance update. The meaning of success, warning, and Failure Status Codes is defined in Section H.2.5
The N-DELETE is used to delete the complete Basic Film Session SOP Instance hierarchy. As a result, all references to Image SOP Instances within the film session are deleted.
The Basic Film Session SOP Instance hierarchy consists of one Basic Film Session SOP Instance, one or more Basic Film Box SOP Instances, 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.
The Basic Film Session SOP Instance hierarchy can be visualized as a reversed tree with the Basic Film Session SOP Instance as the root and the Image Box SOP Instances as the leaves.
There are no specific Status Codes. See PS3.7 for response Status Codes.
The SCU uses the N-DELETE to request the SCP to delete the Basic Film Session SOP Instance hierarchy. The SCU shall specify in the N-DELETE request primitive of the SOP Instance UID of the Basic Film Session (root).
The SCP shall delete the specified SOP Instance hierarchy.
The SCP shall not delete SOP Instances in the hierarchy as long as there are outstanding references to these SOP Instances
It is beyond the scope of the Standard to specify when the SCP actually deletes SOP Instances with outstanding references.
The SCP shall return the Status Code of the requested SOP Instance deletion. The meaning of success, warning, and Failure Status Codes is defined in Section H.2.5.
The N-ACTION is used to print the film session; i.e., to print all the films that belong to the film session.
If multiple copies of the film session have been requested, the SCP shall collate the copies. This means that if two copies of four films has been specified, the printed sequence is 12341234.
The arguments of the N-ACTION are defined in Table H.4-3.
The Action Reply argument is encoded as a DICOM Data Set. The Data Set only contains the Attribute Referenced Print Job Sequence (2100,0500), which includes the Referenced SOP Class UID (0008,1150) and the Referenced SOP Instance UID (0008,1155).
If the SCP supports the Print Job SOP Class, the Action Reply argument is contained in the N-ACTION response. Otherwise, the Action Reply is not contained in the N-ACTION response.
Table H.4-3. N-ACTION Arguments
Table H.4-4defines the specific Status Code values that may be returned in a N-ACTION response. See PS3.7 for additional response Status Codes.
Table H.4-4. SOP Class Status Values
The SCU uses the N-ACTION to request the SCP to print all the films belonging to the identified film session.
The SCP shall make a copy of the "working" Basic Film Session SOP Instance hierarchy, which contains all the information to control the Print Process. Hence the SCU may further update the "working" SOP Instance hierarchy without affecting the result of previous print requests. The execution of the Print Process is monitored by the Print Job SOP Instance (if supported by the SCP) and the Printer SOP Class.
If the SCP supports the Print Job SOP Class then the SCP shall create a Print Job SOP Instance, which contains the copy of the "working" Basic Film Session SOP Instance hierarchy and shall return the Print Job SOP Class/Instance UID pair in the Attribute Referenced Print Job Sequence of the Action Reply argument.
If the SCP supports the Print Job SOP Class, it creates a single Print Job for all the films of the film session.
The SCP shall return the Status Code of the requested operation. The meaning of success, warning, and Failure Status Codes is defined in Section H.2.5.
The N-ACTION shall be issued only if the Basic Film Session SOP Instance hierarchy contains at least one Film Box SOP Instance.
| DICOM PS3.4 2024d - Service Class Specifications |
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