This section may be considered in two portions.  First, the introductory fields and the Ordering Services fields capture information about the type and purpose of the 3D printed object, what clinical service ordered the object, and how the digital modeling was performed.  Second, the Anatomic Parts fields are used to describe the part(s) that make up the object.  


Anatomic Model

 

The parts of the anatomic model are specified using the Anatomic Parts fields.  You must select Anatomic Model as Type of 3D Printed Object before the Anatomic Parts selection is visible. Then you must click Add Anatomic Part in order to see the Anatomic Parts fields. Anatomic model fields

At least one part must be provided, with a maximum of 20.  In models with multiple parts, the dominant part must be listed first.   Each part is specified using a system of attributes (i.e. region, subregion, structure, laterality, comment).  In general, a part will be specified using a combination of region, subregion and structure terms.  For example, a model of the bony skull base would be described with region “Head”, subregion “Skull base” and (generic) structure “Bone”.  



However, subregion is often not used.  For example, a model of the prostate would be described with region “Pelvis” and structure “Prostate”. Anatomic parts example 2

Laterality is always relevant for structures in the extremity or breast, and sometimes relevant in other regions.  For example, a model of the right humerus would be described with region “Upper extremity”, subregion "Upper arm", structure “Bone” and laterality “Right”.  Anatomic parts example 4

A model of a tumor in the left breast would be described with region “Breast”, structure “Tumor” and laterality “Left”. Anatomic parts example 5

In cases where the field descriptors do not uniquely distinguish structures, the comment field is used to further clarify.  For example, a model of the right tibia and fibula would be described as:

 

  1. Region “Lower extremity”, subregion “Lower leg”, structure “Bone”, laterality “Right” and comment “Tibia”

  2. Region “Lower extremity”, subregion “Lower leg”, structure “Bone”, laterality “Right” and comment “Fibula”

 

In a few selected instances, omitting the structure term will still describe a printable part.  For example, region “Chest” with subregion “Chest wall” can describe a valid part.  Even though the chest wall is composed of many constituent types of tissue (e.g. ribs, muscles, nerves), taken as a whole the chest wall is a segmentable structure that may correlate with a single surface mesh.  In such cases, at least a subregion is required.  Only subregions “Heart”, “Chest wall” and “Brain” may be used in this way.  In these cases, a specific structure is not necessarily required, and the region and subregion may suffice.


To edit or delete an anatomic part, click the ellipsis on the right side of the row in which the part appears:


Anatomic part ellipsis

Then click either Edit or Delete.


Anatomic Guide


The parts of the anatomic guide are specified using the Anatomic Parts fields.  You must select Anatomic Part as Type of 3D Printed Object before the Anatomic Parts selection is visible. Then you must click Add Anatomic Part in order to see the Anatomic Parts fields. At least one part must be provided, with a maximum of 15.  Because guides do not represent anatomic structures directly, but rather represent pieces designed to fit against anatomic structures, the method of specifying parts is different than that for anatomic models.  Guide parts are selected from a relatively short list (as shown in the drop-down menu for Guide Part).  While these terms are anatomic, they are meant to correspond to pieces designed for use in relation to the named anatomy.  For example, a guide part “Fibula” indicates a part designed to fit the fibula.


Note that Laterality and Comment may be relevant for guide parts.   A left fibular guide should be described with part “Fibula” and laterality “Left”.  If a guide in a single area consists of multiple, separately engineered parts, then the comment field is used to distinguish these parts.


For further information on specific data elements, refer to the 3DP Registry Data Dictionary.


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