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48. Note and record the Mean and SD values of the four regions. See
chart below.
49. After recording values, a fifth ROI is required from the center
of the water area. The fifth measurement replaces the first
measurement, since four measurements are the limit.
50. Note and record the Mean and SD values of the center ROI.
Subtract each Mean Value from the Mean Value of the center
ROI. If any difference is greater than 90, make sure phantom is
correctly centered in FOV and re-measure. If the difference is
still greater than 90, call Technical Support.
Measured
Values
Upper
Left
Upper
Right
Lower
Left
Lower
Right
Center
Mean
SD
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