Processing Of X Ray Film

Processing Of X Ray Film

Write in detail about interaction of X-rays with matter. add a note on chemical changes occurring in the film after exposure and formation of latent image.
Answer.

X-ray film processing

Note on chemical changes occurring in the film after exposure and formation of the latent image

“Understanding the role of X-ray film processing in diagnostic imaging: Q&A explained”

• Film emulsion is formed of silver bromide crystals and silver iodide crystals that have been precipitated in gelatin and layered on a thin sheet of transparent base.
• Silver halide crystals are imperfect in many aspects and they consist of few of the free interstitial silver ions in the spaces between the crystalline lattice.
• There is presence of physical distortion in the regular rectangular array of silver and bromide ion crystals due to the presence of iodine atom occupying some of the bromide sites.
• Silver halide crystals are chemically sensitized by presence of sulfur compounds which cause physical irregularities in the crystal produced by iodide ions, and these are known as latent image sites. processing of radiographic film

“Importance of studying X-ray film processing for better imaging outcomes: Questions explained”

• Function of the latent image sites is to begin process of image formation by trapping electrons generated when the emulsion gets irradiated.radiographic film processing steps
• When silver halide crystals are irradiated by X-ray photons it will result in the release of electrons by bromide ions which get converted to bromine atoms, by the removal of an electron (recoil electron). This recoil electron produced has sufficient kinetic energy by which it moves in the crystal and strikes the image site, imparting a negative charge to that region.
• Free, positively charged interstitial silver ions get attracted to negative latent image site and neutralize the image site with the result that an atom of metallic silver is deposited at the site.

“Common challenges in performing X-ray film processing effectively: FAQs provided”

• After the exposure of film to radiation, aggregate of silver atoms at latent image sites, comprises the latent image. This is the metallic silver at each latent image site that catalyses development of halide crystal in which it formed and renders the crystal sensitive to development and image formation.
• So, primary action of the processing solutions is to convert crystals with latent images into black metallic silver grains that can be visualized and to remove the unexposed silver bromide crystals.