| DICOM PS3.17 2024c - Explanatory Information |
|---|
The goal of encapsulating a Stereolithography (STL) 3D manufacturing model file inside a DICOM instance rather than transforming the data into a different representation is to facilitate preservation of the STL file in the exact form that it is used with extant manufacturing devices, while at the same time unambiguously associating it with the patient for whose care the model was created and the images from which the model was derived.
In this example, the patient requires a replacement implant for a large piece of skull on the left side of his head. A 3D manufacturing model (encoded in binary STL) was created by mirroring the corresponding section of the patient's right skull hemisphere, and then modified by trimming to fit the specific implantation area.
The model was derived from a series of CT images (CT-01). The STL data in this example is the first version, having no predecessor. The STL data was created on November 22, 2017 at 7:10:14 AM and then stored in a DICOM instance at 7:15:23 AM. The CT images were acquired weeks earlier.
The STL data was created in the coordinate system of CT-01; so they share the same Frame of Reference UID value.
A preview image (optional) showing the rendered 3D object was created and included with the encapsulated STL as an icon image.
No burned in annotation identifying the patient was included. The region of the skull reconstructed in the model contains no distinguishing facial features of the patient.
Table IIII.1-1. CT Derived Encapsulated STL Example
|
CID 7060 “Encapsulated Document Source Purpose of Reference” |
|||
|
In this example, mirroring (from the right side) was performed to create the object. |
|||
|
In this example, the goal is to implant the object in the patient. |
|||
|
<Content of Table C.7-11b "Image Pixel Macro Attributes" not shown> |
|||
| DICOM PS3.17 2024c - Explanatory Information |
|---|