4-2 8F2927 January 17, 2007
Adding Modalities and Selecting Image Quality Parameters
Selecting the Image Quality Parameter Values
The parameter selections are based on modality type. They also depend on
whether the modality is Grayscale Standard Display Function (GSDF)
compliant.
IMPORTANT: If the modality is GSDF-compliant and uses Presentation
Look-Up Tables (PLUTs) for all images, it is not necessary to
change the image quality parameters in the Imager.
To select the parameters:
1. From the Main Screen, select:
Utilities>Configuration>Configure Modality
2. Select the modality.
3. Touch Select.
4. Select the Contrast tab.
5. Touch:
•the Help button.
• the button for the modality being edited.
IMPORTANT: Make sure you select values based on whether the modality
is GSDF-compliant or non GSDF-compliant.
6. Write down the values for:
• TFT Set
• Image Density
• Contrast Table
• Smoothing
7. Close the Help screens.
8. On the Contrast tab screen, select the values for Contrast Table and
TFT Set.
9. Select the Image tab.
10. Select the values for Image Density and Smoothing.
11. For Border Density on the film, choose a low density for a clear border
and a high density for a black border. Typically this density is matched to
the Image Density.
12. For Polarity of the film, choose either Positive or Negative. Positive is
used for most applications. Negative is used by Nuclear Medicine
modalities.
NOTE: Some DICOM GSDF-modalities may direct the use of DICOM
Presentation Look-Up Tables (PLUTs) for some or all images. If the
PLUT capability in the 6800 Imager is enabled, a PLUT sent from the
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