A.33.6 XA/XRF Grayscale Softcopy Presentation State Information Object Definition

A.33.6.1 XA/XRF Grayscale Softcopy Presentation State IOD Description

The XA/XRF Grayscale Softcopy Presentation State Information Object Definition (IOD) specifies information that may be used to present angiographic projection images that are referenced from within the IOD.

It includes capabilities from the Grayscale Softcopy Presentation State IOD for specifying:

a. the output grayscale space in P-Values

b. grayscale contrast transformations including VOI LUT

c. selection of the area of the image to display and whether to rotate or flip it

d. image and display relative annotations, including graphics, text and overlays

For the presentation of angiographic projection images the following capabilities are provided:

a. shutter specifications on a frame-by-frame basis

b. mask subtraction including regional pixel shift

c. presentation of sets of frames

A.33.6.2 XA/XRF Grayscale Softcopy Presentation State IOD Module Table

Table A.33.6-1 XA/XRF GRAYSCALE SOFTCOPY PRESENTATION STATE 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
Presentation Series C.11.9 M
Equipment General Equipment C.7.5.1 M
Enhanced General Equipment C.7.5.2 M
Presentation Presentation State Identification C.11.10 M
State Presentation State Relationship C.11.11 M
Presentation State Shutter C.11.12 M
Bitmap Display Shutter C.7.6.15 C - Required if a Display Shutter is to be applied to referenced image(s) and the XA/XRF Presentation State Shutter Module is not present
Overlay Plane C.9.2 C - Required if Overlay is to be applied to referenced image(s) or the Bitmap Display Shutter Module is present
Overlay Activation C.11.7 C- Required if referenced image contains overlay data that is to be displayed or Presentation State Instance contains Overlay data other than Bitmap Shutter
Displayed Area C.10.4 M
Graphic Annotation C.10.5 C - Required if Graphic Annotations are to be applied to referenced image(s)
Spatial Transformation C.10.6 C - Required if rotation or flipping are to be applied to referenced image(s)
Graphic Layer C.10.7 C - Required if Graphic Annotations or Overlays or Curves are to be applied to referenced image(s)
Softcopy VOI LUT C.11.8 C - Required if a VOI LUT is to be applied to referenced image(s)
XA/XRF Presentation State Mask C.11.19 C - Required if the referenced image(s) are to be subtracted
XA/XRF Presentation State Shutter C.11.20 C - Required if a Display Shutter is to be applied to referenced image(s) and the Bitmap Display Shutter Module is not present
XA/XRF Presentation State Presentation C.11.21 C - Required if the referenced image(s) are to be displayed with a prescribed preference
Softcopy Presentation LUT C.11.6 M
SOP Common C.12.1 M

In the XA/XRF Grayscale Softcopy Presentation State IOD, the Presentation Series Module specializes some Attributes of the General Series Module, the XA/XRF Presentation State Mask Module specializes some Attributes of the Mask Module, and the XA/XRF Presentation State Shutter Module specializes some Attributes of the Bitmap Display Shutter and Display Shutter Modules.

Notes: 1. Subtraction between different images is not supported.

2. The Display Shutter may be used to darken image areas that surround important information and exclude extraneous bright areas that increase glare and ambient lighting impairing image interpretation. For example, unexposed areas in a XA image might be obscured using the Display Shutter, rather than permanently replacing image pixels in those areas.

3. This IOD does not support the storage of a multi-frame overlay in the IOD itself, but does support selective activation of multi-frame overlays within the referenced images via the Overlay Activation Module.