29: Latent Image Formation

Latent Image Formation

Ravikiran B.N. Ongole and Praveen

Formation of a visible radiographic image is a three-stage process:

1. Interaction of X-ray beams with the object of interest.

2. Interaction of the information carrying X-ray beam with the photosensitive silver halide crystals in the film (latent image formation).

3. Chemical action of developing solutions which convert the latent into visible image.

Formation of Latent Image

To understand the formation of latent image, one needs to know the composition of an intraoral film. A dental film comprises of an emulsion suspended in gelatinous vehicle that is coated onto a plastic supporting base.

The emulsion is composed mainly of photosensitive silver bromide crystals and to a lesser extent silver iodide crystals and very small amounts of free silver ions interspersed in the crystal />

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Tags: Textbook of Oral Medicine Oral Diagnosis and Oral Radiology

Jan 12, 2015 | Posted by mrzezo in Oral and Maxillofacial Radiology | Comments Off

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