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syngo Dynamic Evaluation
5. Evaluation of Region of Interests
You select the image regions to be evaluated by mark-
ing them with ROIs or applying the pixel lens (a circular 
ROI with a fixed but configurable diameter). An abso-
lute/relative CT-value calculation is performed for 
these selected image.
• You can draw either elliptical or freehand ROIs.
• You can modify an ROI in any image, precisely adapt-
ing it to the shape you feel is relevant.
• The number of ROIs that can be defined is limited to 
five – you can only draw one pixel lens.
• The ROIs that you have drawn are transferred to the 
other views.
• To aid examination, they are numbered in sequence 
and color-coded.
Display of the Pixel Lens curve
C2-025.630.01.01.02_APPLICATIONGUIDE_SPIRIT.book  Page 314  Friday, April 8, 2005  9:55 AM