A.14 X-Ray Angiographic Image IOD
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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.

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