Материал: part03

A.85.2 Encapsulated OBJ IOD​

A.85.2.1 Encapsulated OBJ IOD Description​

The Encapsulated OBJ Information Object Definition (IOD) describes a 3D model in OBJ format. Any supporting material library file​ (MTL) and supporting 2D texture map image files are addressed in other distinct IODs (see Section A.85.3.1 and Section A.8.5.4).​

A.85.2.2 Encapsulated OBJ Entity-Relationship Model​

This IOD uses the E-R Model in Section A.1.2, with only the Encapsulated Document IE below the Series IE.​

A.85.2.3 Encapsulated OBJ IOD Module Table​

Table A.85.2-1 specifies the Encapsulated OBJ IOD Modules.​

Table A.85.2-1. Encapsulated OBJ IOD Modules​

A.85.2.4 Encapsulated OBJ IOD Content Constraints​

A.85.2.4.1 Encapsulated Document​

The Encapsulated Document (0042,0011) Attribute shall contain an ASCII OBJ byte stream [OBJ].​

Note​

The Frame Of Reference UID (0020,0052) is an identifier for the origin and axes implicit in the OBJ data.​

A.85.2.4.2 MIME Type of Encapsulated Document​

Enumerated Values:​

model/obj​

- Standard -​

A.85.2.4.3 Modality​

Enumerated Values:​

M3D​

A.85.3 Encapsulated MTL IOD​

A.85.3.1 Encapsulated MTL IOD Description​

The Encapsulated MTL Information Object Definition (IOD) describes in MTL format a materials library used by an Encapsulated OBJ​ 3D model (see Section A.85.2.1).​

A.85.3.2 Encapsulated MTL Entity-Relationship Model​

This IOD uses the E-R Model in Section A.1.2, with only the Encapsulated Document IE below the Series IE.​

A.85.3.3 Encapsulated MTL IOD Module Table​

Table A.85.3-1 specifies the Encapsulated MTL IOD Modules.​

Table A.85.3-1. Encapsulated MTL IOD Modules​

A.85.3.4 Encapsulated MTL IOD Content Constraints​

A.85.3.4.1 Encapsulated Document​

The Encapsulated Document (0042,0011) Attribute shall contain an ASCII MTL byte stream [OBJ].​

A.85.3.4.2 MIME Type of Encapsulated Document​

Enumerated Values:​

model/mtl​

- Standard -​

A.85.3.4.3 Modality​

Enumerated Values:​

M3D​

A.86 RT Second Generation​

A.86.1 RT Second Generation Objects​

This section provides a brief description of the IODs of RT Second Generation. Specifically, this description includes:​

•​The Real-World Object which is represented by the IOD.​

•​Information as to the scope of the represented object, if appropriate.​

A.86.1.1 RT Second Generation Common Information​

This section provides a description of the Module structure which is shared by the RT Second Generation IODs.​

A.86.1.1.1 RT Second Generation Entity-Relationship Model​

The E-R Model in Figure A.86.1.1.1-1 depicts those components of the DICOM Information Model that are relevant to RT Second​ Generation IODs.​

Patient

1 is the subject of

Figure A.86.1.1.1-1. RT Second Generation IOD Information Model​

A.86.1.1.1.1 Use of Study and Series in RT Second Generation Radiotherapy​

For first generation IODs, no specific semantics are attached to a Study or a Series in RT. Similarly, for RT Second Generation IODs,​ internalreferencesshallbeusedtorelateandlocateSOPInstancesratherthanmakingassumptionsabouthowrelatedSOPInstances​ are grouped into Studies or Series. For practical reasons it may be indicated to create a new Study separate from imaging Studies​ that are used for radiotherapeutic planning because of billing or reimbursement for Series that contain RT instances.​

ImplementersshouldalsonotethattheDICOMStandard,ingeneral,doesplacesomerestrictionsonhowsuchSOPInstancesshould​ be grouped, as defined in Section A.1.2.3.​

For non-image modalities like radiotherapy, the Series may not be the most efficient way to search for objects. Instead, an application​ might find it easier to use references in the RT Course object, Key Object Selection objects or Unified Worklist Procedure Steps to​ directly retrieve required instances rather than search for them.​

- Standard -​

A.86.1.2 RT Physician Intent IOD​

A.86.1.2.1 RT Physician Intent IOD Description​

The RT Physician Intent IOD carries the prescriptions by which the physician describes the therapeutic goal and strategy for the ra-​ diotherapeutic treatment.​

A.86.1.2.2 RT Physician Intent IOD Entity-Relationship Model​

See Figure A.86.1.1.1-1.​

A.86.1.2.3 RT Physician Intent IOD Module Table​

Table A.86.1.2-1. RT Physician Intent IOD Modules​

A.86.1.2.4 RT Physician Intent IOD Constraints​

A.86.1.2.4.1 Modality Attribute​

The value of Modality (0008,0060) shall be RTINTENT.​

A.86.1.2.4.2 Radiotherapy Common Instance Module​

The following Code Sequences shall have a value from the specified CID:​

Author Identification Sequence (3010,0019)​ Defined CID for Organizational Role Code Sequence (0044,010A) is CID 9536​ “Radiotherapy Prescribing and Segmenting Person Roles”.​

- Standard -​

A.86.1.3 RT Segment Annotation IOD​

A.86.1.3.1 RT Segment Annotation IOD Description​

The RT Segment Annotation IOD annotates any general-purpose entity that represents geometric information such as Segmentation​ IOD, Surface Segmentation IOD, and RT Structure Set IOD with radiotherapy-specific information that cannot be encoded in the​ content of the annotated SOP Instance, or overrides that content with new or additional interpretation.​

A.86.1.3.2 RT Segment Annotation IOD Entity-Relationship Model​

See Figure A.86.1.1.1-1.​

A.86.1.3.3 RT Segment Annotation IOD Module Table​

Table A.86.1.3-1. RT Segment Annotation IOD Modules​

A.86.1.3.4 RT Segment Annotation IOD Constraints​

A.86.1.3.4.1 Modality Attribute​

The value of Modality (0008,0060) shall be RTSEGANN.​

A.86.1.3.4.2 Radiotherapy Common Instance Module​

The following Code Sequences shall have a value from the specified CID:​

Author Identification Sequence (3010,0019)​ Defined CID for Organizational Role Code Sequence (0044,010A) is CID 9536​ “Radiotherapy Prescribing and Segmenting Person Roles”.​

- Standard -​