DANB Radiology Exam 2026 – Comprehensive Practice Test

The emulsion in radiographic film is primarily composed of gelatin and silver halide crystals. Gelatin serves as a binding medium, providing a stable and flexible matrix in which the silver halide crystals are suspended. Silver halide crystals are light-sensitive materials that play a crucial role in the film's ability to capture images when exposed to ionizing radiation. When x-rays strike the film, the silver halide crystals undergo a chemical reaction, ultimately resulting in a latent image that is later developed into a visible image. This composition is essential for the film's function in radiography, making it highly effective for producing diagnostic images.

Understanding this composition is vital for anyone studying radiology and working with radiographic films, as it highlights the chemistry behind image formation and the importance of both components in achieving high-quality radiographs.