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5. Working With ROI Tools<br />

80<br />

Method 1<br />

Draw a subject ROI that<br />

includes the measurement<br />

ROI and the average<br />

background ROI. For details<br />

on how to draw a subject ROI,<br />

see page 78.<br />

Method 2<br />

Right-click the measurement<br />

ROI and select Set BkG ROI<br />

to Bkg X on the shortcut<br />

menu that appears.

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