X-ray interaction with photographic film produces a latent image. This invisible change within the silver halide crystals embedded in the film’s emulsion becomes visible after chemical development, revealing a range of densities corresponding to the varying intensity of the x-rays that struck the film. For instance, areas exposed to higher x-ray intensity will appear darker after processing, while areas exposed to lower intensity will appear lighter. This principle allows for the creation of images showing the internal structure of objects based on their differential absorption of x-rays.
This fundamental process was crucial in the early development of medical imaging and numerous scientific fields. Historically, x-ray film served as the primary method for capturing and visualizing x-ray images, enabling diagnoses of fractures, detection of foreign bodies, and study of crystal structures. While digital detectors are now more commonly used, understanding the interaction of x-rays with film remains essential for comprehending the basic principles of radiation imaging and the historical context of its evolution.
