FFF.2.1.3.1.3 Encoding details

This section provides detailed recommendations of the key attributes to address this particular scenario.

Table FFF.2. 1-28 ENHANCED X-RAY ANGIOGRAPHIC IMAGE IOD MODULES

IE Module PS 3.3 Reference Usage
Image XA/XRF Acquisition C.8.19.3 Specifies the type of positioner.

Table FFF.2. 1-29 ENHANCED XA IMAGE FUNCTIONAL GROUP MACROS

Functional Group Macro PS 3.3 Reference Usage
X-Ray Positioner C.8.19.6.10 Specifies the anatomical angles per-frame.
X-Ray Isocenter Reference System C.8.19.6.13 Specifies the angles of the positioner per-frame in equipment coordinates for further applications based on the acquisition geometry (e.g., 3D reconstruction, registration…).

FFF.2.1.3.1.3.1 XA/XRF Acquisition Module Recommendations

The usage of this module is recommended to define the type of positioner.

Table FFF.2.1-30 XA/XRF ACQUISITION MODULE Example

Attribute Name Tag Comment
Positioner Type (0018,1508) The value CARM is used in this scenario.
C-arm Positioner Tabletop Relationship (0018,9474) Both values YES and NO are applicable to this scenario. Note: On mobile systems where this attribute equals NO, it is possible to do rotation and 3D reconstruction. In such case, the table is assumed to be static during the acquisition.

FFF.2.1.3.1.3.2 X-Ray Positioner Macro Recommendations

This macro is used in the per-frame context in this scenario.

Table FFF.2.1-31 X-RAY POSITIONER MACRO Example

Attribute Name Tag Comment
Positioner Position Sequence (0018,9405)
>Positioner Primary Angle (0018,1510) Angle with respect to the patient coordinate system.
>Positioner Secondary Angle (0018,1511) Angle with respect to the patient coordinate system.

FFF.2.1.3.1.3.3 X-Ray Isocenter Reference System Macro Recommendations

If the value of the C-arm Positioner Tabletop Relationship (0018,9474) is NO, the following macro may not be provided by the acquisition modality. This macro is used in the per-frame context in this scenario.

Table FFF.2.1-32 X-RAY ISOCENTER REFERENCE SYSTEM MACRO Example

Attribute Name Tag Comment
Isocenter Reference System Sequence (0018,9462)
>Positioner Isocenter Primary Angle (0018,9463) Angle with respect to the Isocenter coordinate system, independent of table angulations and how the patient is positioned on the table.
>Positioner Isocenter Secondary Angle (0018,9464) Angle with respect to the Isocenter coordinate system, independent of table angulations and how the patient is positioned on the table.
>Positioner Isocenter Detector Rotation Angle (0018,9465) Angle with respect to the Isocenter coordinate system, independent of table angulations and how the patient is positioned on the table.