What are Thumbnails?
Definition: Miniature pictures of images using very small, low resolution data files. These download for display very quickly, and can be compared on-screen to select the proper high-resolution image.
Now you have something else to worry about:
Medical Radiation Exposure Of The U.S. Population Greatly Increased Since The Early 1980s
What is a Laser Digitizer?
Definition: A laser scanner that employs a laser to capture image information to digital form. Very high resolution and wide gray scale range are possible.
Because it uses coherent light, the laser scanner can penetrate thick films (an ability measured in units of optical density) and extract information better than CCD scanners.
Serves the same function as CCD X-ray scanners, but generally at higher resolution, better contrast, and much higher price.