Annex H (Normative) - General Purpose DVD with Compression Interchange Profiles

H.1 Profile Identification

This Annex defines an Application Profile Class potentially inclusive of all defined Media Storage SOP Classes. This class is intended to be used for the interchange of Composite SOP Instances via DVD media for general purpose applications. Objects from multiple modalities may be included on the same media. Images may be compressed with or without loss using either JPEG or JPEG 2000; all readers shall support compression.

A detailed list of the Media Storage SOP Classes that may be supported is defined in PS 3.4.

Table H.1-1 STD-GEN-DVD and STD-GEN-SEC-DVD Profiles

Application Profile Identifier Description
General Purpose DVD Interchange with JPEG STD-GEN-DVD-JPEG Handles interchange of Composite SOP Instances such as Images, Structured Reports, Presentation States and Waveforms, either uncompressed or with lossless or lossy JPEG.
General Purpose DVD Interchange with JPEG 2000 STD-GEN-DVD-J2K Handles interchange of Composite SOP Instances such as Images, Structured Reports, Presentation States and Waveforms, either uncompressed or with lossless or lossy JPEG 2000.
General Purpose Secure DVD Interchange with JPEG STD-GEN-SEC-DVD-JPEG Handles interchange of Composite SOP Instances such as Images, Structured Reports, Presentation States and Waveforms, either uncompressed or with lossless or lossy JPEG. Offers confidentiality, integrity and, depending on the File-set creator’s choice, data origin authentication.
General Purpose Secure DVD Interchange with JPEG 2000 STD-GEN-SEC-DVD-J2K Handles interchange of Composite SOP Instances such as Images, Structured Reports, Presentation States and Waveforms, either uncompressed or with lossless or lossy JPEG 2000. Offers confidentiality, integrity and, depending on the File-set creator’s choice, data origin authentication.

Equipment claiming conformance to this Application Profile shall list the subset of Media Storage SOP Classes that it supports in its Conformance Statement.

Note: Since it is not required to support all Media Storage Classes the user should carefully consider the subset of supported Media Storage SOP Classes in the Conformance Statements of such equipment to establish effective object interchange.

H.2 Clinical Context

This Application Profile Class facilitates the interchange of images and related data on DVD media. Typical interchange would be between acquisition devices, archives and workstations.

This Application Profile Class facilitates the creation of a multi-modality medium for image interchange, useful for clinical, patient record, teaching and research applications, within and between institutions.

This profile is intended only for general purpose applications. It is not intended as a replacement for specific Application Profiles that may be defined for a particular clinical context.

Note: The creation of a DVD is considerably more complex than the reading thereof. Therefore the clinical context for this Application profile is likely to be asymmetric, with a sophisticated File Set Creator and relatively simple File Set Readers.

H.2.1 Roles and Service Class Options

This Application Profile Class uses the Media Storage Service Class defined in PS3.4.

The Application Entity shall support one or more of the roles of File Set Creator (FSC) or File Set Reader (FSR) , defined in PS 3.10. The File Set Updater (FSU) role is not defined.

H.2.1.1 File Set Creator

The role of File Set Creator shall be used by Application Entities that generate a File Set under this Image Interchange Class of Application Profiles.

File Set Creators shall be able to generate the Basic Directory SOP Class in the DICOMDIR file with all the subsidiary Directory Records related to the Image SOP Classes stored in the File Set.The Application Entity acting as a File Set Creator generates a File Set under a STD-GEN-DVD or STD-GEN-SEC-DVD Application Profile.

FSC shall offer the ability to either finalize the physical volume at the completion of the most recent write session (no additional information can be subsequently added to the volume) or to allow multi-session (additional information may be subsequently added to the volume). An FSC may allow packet-writing, if supported by the media and file system specified in the profile.

Note: A multiple volume (i.e. a logical volume that can cross multiple physical media) is not supported by this class of Application profile. If a set of Files, e.g., a Study, cannot be written entirely on one physical volume (side of one piece of media), the FSC will create multiple independent DICOM File Sets such that each File Set can reside on a single physical volume (side of a single piece of media) controlled by its individual DICOMDIR file. The user of the FSC can opt to use written labels on the physical volumes to indicate that there is more than one physical volume for this set of files (e.g., a study).

H.2.1.2 File Set Reader

The role of File Set Reader shall be used by Application Entities that receive a transferred File Set under the Image Interchange Class of Application Profiles. Typical entities using this role would include image generating systems, display workstations, and archive systems that receive a patient record; e.g. transferred from another institution.

File Set Readers shall be able to read the DICOMDIR directory file and all the SOP Instance files defined for this Application Profile, for which a Conformance Statement is made, using all the defined Transfer Syntaxes for the Profile.

Note: All Transfer Syntaxes defined in the profile must be supported by the FSR. It is not permissible to only support one or other of the uncompressed or the compressed Transfer Syntaxes.

H.2.1.3 File Set Updater

The FSU role is not defined for the STD-GEN-DVD and STD-GEN-SEC-DVD profiles.

H.3 STD-GEN-DVD and STD-GEN-SEC-DVD Profile ClassES

H.3.1 SOP Classes and Transfer Syntaxes

This Application Profile is based on the Media Storage Service Class (see PS 3.4).

Table H.3-1STD-GEN-DVD and STD-GEN-SEC-DVD SOP Classes and Transfer Syntaxes

Information Object Definition Service Object Pair Class UID Transfer Syntax and UID FSC Requirement FSR Requirement
Basic Directory 1.2.840.10008.1.3.10 Explicit VR Little Endian Uncompressed 1.2.840.10008.1.2.1 Mandatory Mandatory
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 See PS 3.4 Explicit VR Little Endian Uncompressed 1.2.840.10008.1.2.1 Defined in Conformance Statement Mandatory for all SOP Classes defined in Conformance Statement
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 See PS 3.4 JPEG Lossless Process 14 (selection value 1) 1.2.840.10008.1.2.4.70 Defined in Conformance Statement Mandatory for –JPEG profiles for all SOP Classes defined in Conformance Statement
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 Refer to: PS 3.4 JPEG Lossy, Baseline Sequential with Huffman Coding (Process 1) 1.2.840.10008.1.2.4.50 Defined in Conformance Statement Mandatory for –JPEG profiles for all SOP Classes defined in Conformance Statement
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 Refer to: PS 3.4 JPEG Extended (Process 2 & 4): Default Transfer Syntax for Lossy JPEG 12 Bit Image Compression (Process 4 only) 1.2.840.10008.1.2.4.51 Defined in Conformance Statement Mandatory for –JPEG profiles for all SOP Classes defined in Conformance Statement
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 Refer to: PS 3.4 JPEG 2000 Image Compression (Lossless Only) 1.2.840.10008.1.2.4.90 Defined in Conformance Statement Mandatory for –J2K profiles for all SOP Classes defined in Conformance Statement
Composite IODs for which a Media Storage SOP Class is defined in PS 3.4 Refer to: PS 3.4 JPEG 2000 Image Compression 1.2.840.10008.1.2.4.91 Defined in Conformance Statement Mandatory for –J2K profiles for all SOP Classes defined in Conformance Statement
The SOP Classes and corresponding Transfer Syntax supported by this Application Profile are specified in the Table H.3-1. The supported Storage SOP Class(es) shall be listed in the Conformance Statement using a table of the same form.

H.3.2 Physical Medium And Medium Format

The STD-GEN-DVD and STD-GEN-SEC-DVD application profiles require any of the 120 mm DVD media other than DVD-RAM, as defined in PS 3.12.

H.3.3 Directory Information in DICOMDIR

Conformant Application Entities shall include in the DICOMDIR File the Basic Directory IOD containing Directory Records at the Patient and the subsidiary Study and Series levels, appropriate to the SOP Classes in the File Set.

All DICOM files in the File Set incorporating SOP Instances defined for the specific Application Profile shall be referenced by Directory Records.

Note: DICOMDIRs with no directory information are not allowed by this Application Profile.

All implementations shall include the DICOM Media Storage Directory in the DICOMDIR file. There shall only be one DICOMDIR file per File Set. The DICOMDIR file shall be in the root directory of the medium. The Patient ID at the patient level shall be unique for each patient directory record in one File Set.

H.3.3.1 Additional Keys

File Set Creators and Updaters are required to generate the mandatory elements specified in PS 3.3.

Table H.3-2 specifies the additional associated keys. At each directory record level other additional data elements can be added, but it is not required that File Set Readers be able to use them as keys. Refer to the Basic Directory IOD in PS 3.3.

Table H.3-2STD-GEN-DVD and STD-GEN-SEC-DVD Additional DICOMDIR Keys

Key Attribute Tag Directory Record Type Type Notes
Patient’s Birth Date (0010,0030) PATIENT 1C Required if present in any objects referenced by subordinate records with a non-zero length value.
Patient’s Sex (0010,0040) PATIENT 1C Required if present in any objects referenced by subordinate records with a non-zero length value.
Institution Name (0008,0080) SERIES 1C Required if present in any objects referenced by subordinate records with a non-zero length value.
Institution Address (0008,0081) SERIES 1C Required if present in any objects referenced by subordinate records with a non-zero length value.
Performing Physicians’ Name (0008,1050) SERIES 1C Required if present in any objects referenced by subordinate records with a non-zero length value.
Image Type (0008,0008) IMAGE 1C Required if present in image object.
Calibration Image (0050,0004) IMAGE 1C Required if present in image object with a non-zero length value.
Referenced Image Sequence (0008,1140) IMAGE or SPECTROSCOPY 1C Required if present in image object with one or more items, either in the top level dataset or nested within a functional group sequence of the Shared Functional Groups Sequence (5200,9229).
Lossy Image Compression Ratio (0028,2112) IMAGE 1C Required if present in image object with a non-zero length value.
Rows (0028,0010) IMAGE or SPECTROSCOPY 1
Columns (0028,0011) IMAGE or SPECTROSCOPY 1
Frame of Reference UID (0020,0052) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object.
Synchronization Frame of Reference UID (0020,0200) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object.
Number of Frames (0028,0008) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object.
Acquisition Time Synchronized (0018,1800) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object.
Acquisition Datetime (0008,002A) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object.
Image Position (Patient) (0020,0032) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object, either in the top level dataset or nested within a functional group sequence of the Shared Functional Groups Sequence (5200,9229).
Image Orientation (Patient) (0020,0037) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object, either in the top level dataset or nested within a functional group sequence of the Shared Functional Groups Sequence (5200,9229).
Pixel Spacing (0028,0030) IMAGE or SPECTROSCOPY 1C Required if present in image or spectroscopy object, either in the top level dataset or nested within a functional group sequence of the Shared Functional Groups Sequence (5200,9229).

Note: The requirements with respect to the mandatory DICOMDIR keys in PS 3.3 imply that either these attributes are present in the Image IOD, or they are in some other way supplied by the File-set Creator. These attributes are (0010,0020) Patient ID, (0008,0020) Study Date, (0008,0030) Study Time, (0020,0010) Study ID, (0020,0011) Series Number, and (0020,0013) Instance Number.

H.3.4 Other Parameters

H.3.4.2 Multiframe JPEG Format

The JPEG encoding of pixel data shall use Interchange Format (with table specification) for all frames.

H.3.5 Security Parameters

The STD-GEN-SEC-DVD application profiles require that all DICOM Files in the File-set including the DICOMDIR be Secure DICOM Files encapsulated in accordance with the requirements of the Basic DICOM Media Security Profile as defined in PS 3.15.

Note: These Application Profiles do not place any consistency restrictions on the use of the Basic DICOM Media Security Profile with different DICOM Files of one File-set. For example, readers should not assume that all Files in the File-set can be decoded by the same set of recipients. Readers should also not assume that all secure Files use the same approach (hash key or digital signature) to ensure Integrity or carry the same originators’ signatures.