OS X Disk Utility restore failed "Must be imagescanned..." error

While trying to image some Macbook Pros I ran into a problem restoring the prepared image onto the Macbooks. Disk Utility said the image file needed to be imagescanned in order to continue. I didn't know what this meant, but luckily this turned out to be something very simple. If you get this error select your image file you plan to restore, then go to Images->Scan Image for Restore.. in the top menu bar. That will run a quick check on your image file and allow you to restore it once the scan is finished.