A.85 Encapsulated 3D Manufacturing Model IODs

A.85 Encapsulated 3D Manufacturing Model IODs (Current)
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A.85.1 Encapsulated STL IOD

A.85.1.1 Encapsulated STL IOD Description

The Encapsulated STL IOD describes a 3D model in Stereolithography (STL) format that has been encapsulated within a DICOM Information Object.

A.85.1.2 Encapsulated STL 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.85.1.3 Encapsulated STL IOD Module Table

Table A.85.1-1 specifies the Encapsulated STL IOD Modules.

Table A.85.1-1. Encapsulated STL IOD Modules

IE	Module	Reference	Usage
Patient	Patient	C.7.1.1	M
Patient	Clinical Trial Subject	C.7.1.3	U
Study	General Study	C.7.2.1	M
	Patient Study	C.7.2.2	U
	Clinical Trial Study	C.7.2.3	U
Series	Encapsulated Document Series	C.24.1	M
Series	Clinical Trial Series	C.7.3.2	U
Frame of Reference	Frame of Reference	C.7.4.1	M
Equipment	General Equipment	C.7.5.1	M
Equipment	Enhanced General Equipment	C.7.5.2	M
Encapsulated Document	Encapsulated Document	C.24.2	M
	Manufacturing 3D Model	C.35.1	M
	ICC Profile	C.11.15	U
	SOP Common	C.12.1	M
	Common Instance Reference	C.12.2	C - Required if other Instances are referenced

Note

The Specimen Identification Module (Retired) was previously included in this IOD but has been retired. See PS3.3-2008.

A.85.1.4 Encapsulated STL IOD Content Constraints

A.85.1.4.1 Encapsulated Document

The Encapsulated Document (0042,0011) Attribute shall contain a binary STL byte stream [STL 1989]. The encapsulated document may include negative vertex coordinates.

Note

The original STL specification in 1989 required that all 3 vertex coordinates of each triangle be located in the positive quadrant. The creators of the standard (3D Systems) later relaxed this restriction and negative coordinates were allowed. It is common practice in medical usage for STL models to align with the coordinate system of the source DICOM data, which will often result in negative vertex coordinates.
The Frame of Reference UID (0020,0052) is an identifier for the origin and axes implicit in the STL data.

A.85.1.4.2 MIME Type of Encapsulated Document

Enumerated Values:

model/stl

A.85.1.4.3 Modality

Enumerated Values:

M3D

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