A.70 Legacy Converted Enhanced CT Image IOD
Prev | A Composite Information Object Definitions (Normative) | Next

## A.70 Legacy Converted Enhanced CT Image IOD

### A.70.1 Legacy Converted Enhanced CT Image IOD Description

The Legacy Converted Enhanced Computed Tomography (CT) Image Information Object Definition (IOD) specifies an image that has been converted from images originally created by a computed tomography imaging device.

### A.70.2 Legacy Converted Enhanced CT Image IOD Entity-Relationship Model

The E-R Model in Section A.1.2 depicts those components of the DICOM Information Model that directly reference the Legacy Converted Enhanced CT Image IOD.

### A.70.3 Legacy Converted Enhanced CT Image IOD Module Table

Table A.70-1. Legacy Converted Enhanced CT 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
CT Series | C.8.15.1 | M
Clinical Trial Series | C.7.3.2 | U
Frame of Reference | Frame of Reference | C.7.4.1 | M
Synchronization | C.7.4.2 | U
Equipment | General Equipment | C.7.5.1 | M
Enhanced General Equipment | C.7.5.2 | U
Image | Image Pixel | C.7.6.3 | M
Contrast/Bolus | C.7.6.4 | U
Enhanced Contrast/Bolus | C.7.6.4b | U
Multi-frame Functional Groups | C.7.6.16 | M
Multi-frame Dimension | C.7.6.17 | U
Cardiac Synchronization | C.7.6.18.1 | U
Respiratory Synchronization | C.7.6.18.2 | U
Acquisition Context | C.7.6.14 | M
Device | C.7.6.12 | U
Specimen | C.7.6.22 | U
Enhanced CT Image | C.8.15.2 | M
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

#### A.70.3.1 Legacy Converted Enhanced CT Image IOD Content Constraints

The General Image Module, Overlay Plane Module, VOI LUT Module, Supplemental Palette Color Lookup Table Module and Graphic Annotation Module shall not be used in a Standard Extended SOP Class of the Legacy Converted Enhanced CT Image.

### Note

In order to annotate images, whether during acquisition or subsequently, SOP Instances of the Grayscale Softcopy Presentation State Storage or the Structured Report Storage SOP Classes that reference the image SOP Instance, may be used.

No standard mechanism is provided for inclusion of annotations within the image SOP Instance itself, and implementers are discouraged from using private extensions to circumvent this restriction.

Grayscale Softcopy Presentation State Storage Instances that are generated during conversion shall be referenced from the Image SOP Instance by using the Referenced Grayscale Presentation State Sequence in the Enhanced CT Image Module. See Section C.8.15.2.

### Note

The Curve Module has been retired from DICOM. It is still not permitted to be present. See PS3.3-2004.

### A.70.4 Legacy Converted Enhanced CT Image Functional Group Macros

Table A.70-2 specifies the use of the Functional Group Macros used in the Multi-frame Functional Group Module for the Legacy Converted Enhanced CT Image IOD.

Table A.70-2. Legacy Converted Enhanced CT Image Functional Group Macros

Functional Group Macro | Section | Usage
--- | --- | ---
Pixel Measures | C.7.6.16.2.1 | M
Frame Content | C.7.6.16.2.2 | M - May not be used as a Shared Functional Group.
Plane Position (Patient) | C.7.6.16.2.3 | M
Plane Orientation (Patient) | C.7.6.16.2.4 | M
Referenced Image | C.7.6.16.2.5 | C - Required if Referenced Image Sequence (0008,1140) was present in any of the Classic Images that were converted.
Derivation Image | C.7.6.16.2.6 | C - Required if Source Image Sequence (0008,2112) was present in any of the Classic Images that were converted.
Cardiac Synchronization | C.7.6.16.2.7 | U
Frame Anatomy | C.7.6.16.2.8 | C - Required if Body Part Examined (0018,0015) is present and contains a value defined in Annex L “Correspondence of Anatomic Region Codes and Body Part Examined Defined Terms” in PS3.16, or Anatomic Region Sequence (0008,2218) was present in any of the Classic Images that were converted.
Frame VOI LUT | C.7.6.16.2.10 | M
Contrast/Bolus Usage | C.7.6.16.2.12 | U
Respiratory Synchronization | C.7.6.16.2.17 | U
Irradiation Event Identification | C.7.6.16.2.18 | C - Required if Irradiation Event UID (0008,3010) was present in any of the Classic Images that were converted.
CT Image Frame Type | C.8.15.3.1 | M
CT Pixel Value Transformation | C.8.15.3.10 | M
Unassigned Shared Converted Attributes | C.7.6.16.2.25.1 | M - May not be used as a Per-Frame Functional Group
Unassigned Per-Frame Converted Attributes | C.7.6.16.2.25.2 | M - May not be used as a Shared Functional Group
Image Frame Conversion Source | C.7.6.16.2.25.3 | M - May not be used as a Shared Functional Group

Prev | Up | Next
A.69 Surface Scan Point Cloud IOD | Home | A.71 Legacy Converted Enhanced MR Image IOD