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HE/001132 Page 18 of 92
Document No. 001132, Revision 2.0
Agfa HealthCare NodeID Livelink : 14140190 14 June, 2007
2.2.1.3.1.3.1.6 Grayscale Softcopy Presentation State Storage SOP Class
(1.2.840.10008.5.1.4.1.1.11.1)
The Grayscale Softcopy Presentation State Storage SOP Class extends the functionality of the Storage
Service class to add the ability to convey an intended presentation state or record an existing presentation
state.
It includes capabilities for specifying:
· the output grayscale space in P-Values
· grayscale contrast transformations including modality and VOI LUT
· selection of the area of the image to display
· image and display relative annotations, including graphics, text and overlays
Note:
A GSPS always refers to exactly one (1) image. Since re-sending an image is prohibited in
"Workstation", an archived image can also have maximally one (1) GSPS that refers to it.
Depending on the configured SOP class to be used (CR (§ 2.2.1.3.1.3.1), DX for presentation (§2.2.1..3.2) or
MG for presentation (§ 2.2.1.3.1.3.4) annotations and shutters are stored in the GSPS or burned in the
image as described in the following table:
Table 2.2-9: Use of GSPS vs. Burning in the image
CR
DX for presentation
MG for presentation
DX for processing
Image
(processing,W/L,collimation)
Processed pixels
+
LUTs
RAW pixels
Annotations
GSPS or Burned in
Shutters
GSPS or
when GSPS is not used:
In case of CR the shutter is
burned into the Pixel data.
In case of DX and MG the
shutter is described in the
shutter module of the image
header.
Zoom
GSPS or discarded
Markers
Always burned in
Ignored
The following paragraphs describe into detail how each annotation is embedded in the GSPS:
2.2.1.3.1.3.1.6.1 Text