DICOM PS3.3 2019b - Information Object Definitions

A.66 Intravascular OCT IOD

This Section defines an Information Object to be used with Intravascular Optical Coherence Tomography imaging devices.

A.66.1 Intravascular OCT Image IOD Description

The Intravascular Optical Coherence Tomography Image IOD specifies a multi-frame image acquired on an Intravascular Optical Coherence Tomography modality.

The Intravascular OCT Image IOD is used in two SOP Classes as defined in PS3.4 Storage Service Class, a SOP Class for storage of images intended for presentation, and a SOP Class for storage of images intended for further processing before presentation. These are distinguished by their SOP Class UID and by the Enumerated Value of the mandatory Attribute in the Intravascular OCT Series Module, Presentation Intent Type (0008,0068).

IVOCT stores frames of polar data arranged in a rectangular format when "FOR PROCESSING" is specified. The A-lines in a frame are arranged in row order, with the catheter optics toward the left of the image. A-lines are always stored from top to bottom, in order of acquisition. The A-lines are evenly spaced (in angles) to form a complete 360 degrees of acquisition.

Application entities creating IVOCT FOR PRESENTATION SOP instances shall apply all needed processing (e.g., Z offset and refractive index correction) to the IVOCT image for correct presentation.

DICOM PS3.3 2019b - Information Object Definitions