DICOM PS3.3 2024c - Information Object Definitions

A.14 X-Ray Angiographic Image IOD

A.14.1 XA Image IOD Description

This Section defines the Information Object for single plane X-Ray Angiographic (XA) Imaging that includes those Attributes and Information Objects necessary for the interchange of digital X-Ray Angiographic data. This includes images of the heart and all blood vessels.

The X-Ray Angiographic Image IOD share a significant amount of common information with the XRF IOD. The differences between the two IODs are that the XRF Image IOD includes a tomography Module; and the two IODs utilize different methods to specify positioner angles. The XRF Image IOD contains a single column angulation Data Element that uses an Equipment-Based Coordinate System, while X-Ray Angiographic Image IOD c-arm positioner angles are specified in a Patient-Based Coordinate System. RF applications that support a Patient-Based Coordinate System with cranial/caudal, LAO/RAO angles may utilize the X-Ray Angiographic Image IOD.

The X-Ray Angiographic Image IOD is also applicable to clinical areas other than angiography (e.g., Interventional Procedures, Myelography, Biopsy/Localization, and Neurology).


  1. For the purpose of X-Ray Angiography (XA), this IOD can be used to encode a single-frame image, or a Cine Run encoded in a single multi-frame image.

  2. A typical Study might include all the images generated between the time a Patient gets on and gets off the procedure table. As several separable diagnostic or therapeutic processes may occur during a single Study (e.g., pre-intervention CA, left ventriculography, and post-intervention CA), a Series may be defined as comprising a set of images (single or multi-frame) associated with one such process within a Study.

  3. This IOD can be used to encode a single plane acquisition, or one plane of a biplane acquisition.

DICOM PS3.3 2024c - Information Object Definitions