When the magnification mode is used, an increase in image intensifier resolution will increase from:

In fluoroscopy, the magnification mode is utilized to enhance the detail of the image by focusing on a smaller area of the input surface of the image intensifier. When operating in this mode, the resolution improves because the same amount of light is concentrated within a smaller area, allowing for more detail to be observed.

The correct increase in image intensifier resolution from 4 lp/mm (line pairs per millimeter) to about 6 lp/mm accurately reflects the enhancement achieved through magnification. This range indicates a significant improvement in image quality that is particularly valuable in clinical settings where precise observations are critical, such as in interventional procedures.

This improvement is contingent upon the technical characteristics of the fluoroscopy equipment and the design of the image intensifier. As the resolution increases, it allows for better visualization of anatomical structures and pathologies, which is crucial for accurate diagnosis and treatment planning.