GE Revolution CT User Manual page 657

The DFOV determines the anatomic area imaged by a single reconstruction.
•
Area equals pr
•
The 50 cm FOV has a 25 cm radius, so its area equals 1963 cm
•
The ROI or magnification factor determines the anatomic area covered by a magnified
image.
Example: A monitor pixel represents 0.5 by 0.5 mm. Magnify pixel size by 2. Each monitor pixel
now represents 0.25 by 0.25 mm of anatomy.
Chapter 21 General Information
Pixel Size in millimeters
DFOV in cm
20
22
25
30
35
40
45
50
(Area = 3.14 x radius x radius)
2
Illustration 8: Pixel Size and DFOV Illustration
Direction 5480385-1EN, Revision 1
512 x 512
0.39
0.43
0.49
0.59
0.68
0.78
0.88
0.98
Revolution CT User Manual
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