Final answer:
A multifield image intensifier pertains to the modes of magnification it can provide, enhancing image detail by allowing different magnification levels.
Step-by-step explanation:
A "multifield" image intensifier refers to modes of magnification. An image intensifier is a device used to increase the brightness of the images to help see more detail in a picture, especially during medical procedures like X-rays. Multifield image intensifiers have multiple modes that allow the operator to change the size of the input phosphor's active area, effectively varying the magnification of the image. The different 'fields' offer varying levels of magnification, with a smaller field providing a higher degree of magnification. The overall magnification of the system is the product of the individual magnifications of its elements. Thus, multifield capabilities can enhance the detail of an image.