chalk tip #27: scanning presnap calibration

A ScanScope scanning tip:  What is a Presnap calibration and when should you do one?

A Presnap is a “background only” image made from a clear glass slide which is subtracted out from the macro images of slides with tissue, resulting in uniform background lighting.  Perform a Presnap calibration when you see the ScanScope select a scan region that is much larger (or smaller) than the tissue.

It is easy to do:

1. In the ScanScope Console main window, navigate to the Start tab. Click “Manual Load”.

2. Load a clean, blank slide into the slide tray (on CS systems) or onto the scanning stage (on XT systems).

3. Click “Manual Scan”.  The system will retract the stage and capture a macro image.

4. Navigate to the Tools menu at the top of the Console main window.  Select Configure.

5. In the Configure window, click on the “Motion Properties” tab.

6. Click on “Presnap”.  The system will acquire a background Presnap image.

That’s it!  Now you can go ahead and scan slides with tissue and the tissue finding logic will work more accurately.  Next time you’re at a ScanScope, please try it.