When an image intensifier operates in magnification mode, what happens to the field of view?

When an image intensifier operates in magnification mode, the field of view decreases. This occurs because magnification mode focuses on a smaller portion of the input screen, effectively enlarging that specific area for better detail resolution.

As the system magnifies the image, the geometry of the tube requires that a smaller area is viewed. Consequently, while the resolution improves and finer details are observed, the overall size of the visible area diminishes. This trade-off is essential in diagnostic imaging, as it allows clinicians to focus on problematic areas with greater clarity, despite having a reduced field of view. Therefore, understanding the impact of magnification mode on the field of view is crucial for effectively utilizing fluoroscopy in medical imaging.