Which function is NOT performed by the image intensifier?

The function of producing X-rays is not performed by the image intensifier, which primarily enhances images captured from X-ray sources. Instead, the image intensifier functions to amplify and improve the visibility of the images.

Image brightening is a crucial role of the intensifier, as it increases the brightness of the image for better observation. Similarly, image contrast enhancement is essential for distinguishing between different tissues and structures in the image, making it easier to identify abnormalities. The conversion of light to electrons is also integral to the intensifier's operation, utilizing the effect of light-sensitive components to amplify images efficiently.

In summary, while the image intensifier focuses on enhancing and brightening the images derived from X-ray data, it does not generate the X-rays itself, which is a function performed by the X-ray tube in the imaging system.