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Living Image 3.1

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6. <strong>Image</strong> Math<br />

102<br />

To subtract tissue autofluorescence:<br />

1. Load the image sequence that includes the primary and background fluorescent<br />

images.<br />

2. Open either the primary or background image and:<br />

a. Optimize the image display using the color scale Min and Max sliders in the <strong>Image</strong><br />

Adjust tools.<br />

b. Draw a measurement ROI on an area of the animal that represents background signal<br />

(area where no fluorophore signal is present).<br />

Note: You only need to draw the ROI on one of the images. The software copies<br />

the ROI to the other image.<br />

3. Select Tools → <strong>Image</strong> Math for xx.SEQ on the menu bar.

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