The radiographic image capture method that uses chemical development to produce the manifest image is:

• A. Film/screen radiography
• B. Digital radiography
• C. Direct digital radiography
• D. Computed radiography

Answer: (A)

Chemical development to produce the visible image is a hallmark of traditional film-based radiography. In film/screen radiography, X-rays expose a photographic film that sits next to intensifying screens; this exposure creates a latent image inside the silver halide crystals on the film. The film then passes through chemical processing—the developer reduces the exposed crystals to metallic silver, forming the dark tones that create the manifest radiograph, while the fixer makes the image permanent. In contrast, digital methods rely on electronic detectors and computer processing rather than chemical development: computed radiography uses a reusable phosphor plate read out by a laser to generate a digital image, while direct digital radiography uses a flat-panel detector that converts X-rays straight to a digital signal.