Supplement 240: Height Map Segmentation and Revised Ophthalmic OCT En Face Image

This supplement introduces a new Height Map Segmentation information object definition (IOD) and service-object pair (SOP) class to the DICOM Standard.

Height maps are 2-dimensional raster images which store surface elevations. This data can be applied to a 3-dimensional object. In DICOM, a height map is a type of segmentation using a 2-dimensional set of pixels to identify a surface in the 3-dimensional volume of a referenced multiframe image.

The Height Map Segmentation IOD follows the current enhanced multiframe image data architecture. For data management purposes, Height Map Segmentation SOP instances may be treated similarly to other segmentation images. The initial use case for the new IOD and SOP class is in ophthalmic tomography for representing segmentation of retinal layers. They are also broadly applicable for a variety of medical imaging domains.

This supplement also revises the current Ophthalmic Optical Coherence Tomography En Face Image IOD.

Main sections:

· Scope and field of application

· DICOM PS 3.3: Information object definitions

· DICOM PS3.4: Service class specifications

· DICOM PS 3.6: Data dictionary

· DICOM PS 3.16: Content mapping resource

· DICOM PS 3.17: Explanatory information

· Annex CCCCC Height map segmentation (informative)