When using the Automatically Acquire feature with a Microtek scanner, x-rays appear very dark and low contrast.
The Microtek scanner is using a TWAIN driver that is not compatible with the Automatically Acquire feature.
Install one of the compatible Microtek TWAIN drivers from the installation CD:
Insert the installation CD into the CD-ROM drive.
When the installer is displayed,
click on Extras.

Click on the appropriate Microtek TWAIN Update option and then click on the Install button.