How is the squared ratio of input screen to output screen referred to?

The squared ratio of the input screen area to the output screen area is referred to as the minification ratio. This concept is essential in fluoroscopy because it describes how the size of the image on the output screen compares to the input screen. When the input screen is larger than the output screen, the minification ratio indicates how much the image is reduced in size as it is projected from the input to the output.

Understanding the minification ratio is important for evaluating the efficiency of image magnification and ensuring optimal image quality. When the size of the input screen is substantially larger than the output screen, this minification effect allows for clearer and more focused images, helping improve the visualization of fine details during fluoroscopic procedures.