A.14 X-Ray Angiographic Image IOD
Prev | A Composite Information Object Definitions (Normative) | Next

## 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 Imaging that includes those data elements and information objects necessary for the interchange of digital X-Ray Angiographic data. This includes images of the heart and all blood vessels.

The XA 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 XA 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 XA IOD.

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

### Note

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.

### A.14.2 XA Image IOD Entity-Relationship Model

The E-R Model in Section A.1.2 depicts those components of the DICOM Application Information Model that directly reference the X-Ray Angiographic Image IOD, with exception of the Frame of Reference and Modality LUT entities, which are not used. Additionally, "Image" in Figure A.1-1 may represent a single frame or a multi-frame image. A frame denotes a two-dimensional organization of pixels recorded as a single exposure.

### A.14.3 XA Image IOD Module Table

Table A.14-1. X-Ray Angiographic Image IOD Modules

IE | Module | Reference | Usage
--- | --- | --- | ---
Patient | Patient | C.7.1.1 | M
Clinical Trial Subject | C.7.1.3 | U
Study | General Study | C.7.2.1 | M
Patient Study | C.7.2.2 | U
Clinical Trial Study | C.7.2.3 | U
Series | General Series | C.7.3.1 | M
Clinical Trial Series | C.7.3.2 | U
Frame of Reference | Synchronization | C.7.4.2 | U
Equipment | General Equipment | C.7.5.1 | M
Image | General Image | C.7.6.1 | M
Image Pixel | C.7.6.3 | M
Contrast/Bolus | C.7.6.4 | C - Required if contrast media was used in this Image
Cine | C.7.6.5 | C - Required if pixel data is Multi-frame Cine data
Multi-frame | C.7.6.6 | C - Required if pixel data is Multi-frame Cine data
Frame Pointers | C.7.6.9 | U
Mask | C.7.6.10 | C - Required if the Image may be subtracted
Display Shutter | C.7.6.11 | U
Device | C.7.6.12 | U
Intervention | C.7.6.13 | U
Specimen | C.7.6.22 | U
X-Ray Image | C.8.7.1 | M
X-Ray Acquisition | C.8.7.2 | M
X-Ray Collimator | C.8.7.3 | U
X-Ray Table | C.8.7.4 | C - Required if Image is created with table motion, may be present otherwise
XA Positioner | C.8.7.5 | M
DX Detector | C.8.11.4 | U
Overlay Plane | C.9.2 | U
Multi-frame Overlay | C.9.3 | C - Required if Overlay data contains multiple frames.
Modality LUT | C.11.1 | C - Required if Pixel Intensity Relationship (0028,1040) is LOG U - Optional if Pixel Intensity Relationship (0028,1040) is DISP
VOI LUT | C.11.2 | U
SOP Common | C.12.1 | M
Common Instance Reference | C.12.2 | U
Frame Extraction | C.12.3 | C - Required if the SOP Instance was created in response to a Frame-Level retrieve request

### Note

The Curve Module was previously included in the Image IE for this IOD but has been retired. See PS3.3-2004.

Prev | Up | Next
A.13 Standalone VOI LUT IOD | Home | A.15 X-Ray Angiographic Bi-plane Image Information Object Definition (Retired)