A.33.4 Blending Softcopy Presentation State Information Object Definition

A.33.4.1 Blending Softcopy Presentation State IOD Description

The Blending Softcopy Presentation State Information Object Definition (IOD) specifies information that may be used to blend two sets of images that are referenced from within the IOD for the purpose of presentation (display).

It includes capabilities for specifying:

a. the output color space in PCS-Values

b. grayscale contrast transformations including modality and VOI LUT for both the underlying and superimposed image sets

c. a color palette to map the transformed grayscale values of the superimposed image set into pseudo-color

d. selection of the area of the blended images to display and whether to rotate or flip it

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

A.33.4.2 Blending Softcopy Presentation State IOD Module Table

Table A.33.4-1 Blending 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
Presentation Presentation State Identification C.11.10 M
State Presentation State Blending C.11.14 M
Displayed Area C.10.4 M
Graphic Annotation C.10.5 C - Required if Graphic Annotations are to be applied
Spatial Transformation C.10.6 C - Required if rotation or flipping are to be applied
Graphic Layer C.10.7 C - Required if Graphic Annotation Module is present
Graphic Group C.10.11 U
Palette Color LUT C.7.9 M
ICC Profile C.11.15 M
SOP Common C.12.1 M

In the Blending Softcopy Presentation State IOD, the Presentation Series Module specializes some Attributes of the General Series Module.

The Softcopy Presentation LUT Module shall not be present in this IOD.

The Modality LUT and Softcopy VOI LUT Module shall not be present in this IOD, since the Presentation State Blending Module subsumes their function.

The Palette Color LUT Module describes the color mapping to be used for the superimposed image set.

The Displayed Area and Graphic Annotation Modules specifically identify those images or frames to which they apply, and may include images or frames from the underlying or superimposed set.

The Spatial Transformation Module describes any necessary spatial transformation of the image to be rendered after the blending operation.

The Overlay Plane and Overlay/Curve Activation Modules shall not be present, and any overlays present in the referenced images shall not be displayed.

The Display Shutter and Bitmap Display Shutter Modules shall not be present, since the underlying image geometry may differ between the two sets of images.

The ICC Profile Module shall always be present. If the color space to be used is not calibrated (i.e., a device-specific ICC Input Profile is not available), then an ICC Input Profile specifying a well-known space (such as sRGB) may be specified.