Question 1

What refers to a series of steps that produce a visible permanent image on a dental radiograph?&#10;A) Latent imaging&#10;B) Selective reduction&#10;C) X-ray &#10;D) Film processing

Accepted Answer

Film processing refers to a series of steps that produce a visible permanent image on a dental radiograph.

Question 2

The image on the film before it is processed is the:&#10;A) density.&#10;B) latent image.&#10;C) contrast.&#10;D) mirror image.

Accepted Answer

The pattern of stored energy on the exposed film that cannot be seen is referred to as the latent image. The latent image remains invisible within the film emulsion until it undergoes chemical processing procedures.

Question 3

The temperature of the darkroom must be controlled to prevent film damage. What is the recommended room temperature?&#10;A) 70&#176; F&#10;B) 50&#176; F&#10;C) 60&#176; F&#10;D) 80&#176; F

Accepted Answer

A room temperature of 70° F is recommended; if the room temperature exceeds 90° F,
film fogging results.

Question 4

What low-intensity light is composed of long wavelengths in the red-orange spectrum?&#10;A) X-ray&#10;B) Safelight&#10;C) Intensifying screen&#10;D) Filter

Accepted Answer

A safelight is a low-intensity light composed of long wavelengths in the red-orange portion of the visible light spectrum.

Question 5

What provides a great deal of information, exhibits proper density and contrast, has sharp outlines, and is of the same shape and size as the object radiographed?&#10;A) Radiograph&#10;B) Density&#10;C) Diagnostic image&#10;D) Milliamperage

Accepted Answer

A diagnostic image provides a great deal of information; the images exhibit proper density and contrast, are of the same shape and size as the object exposed, and have sharp outlines.

Question 6

What is determined by the thickness, density, and composition?&#10;A) High density&#10;B) Low contrast&#10;C) Film contrast&#10;D) Subject contrast

Accepted Answer

Subject contrast refers to the characteristics of the subject (the dental patient) that influence radiographic contrast. Subject contrast is determined by the size and thickness of patient tissues.

Question 7

What device can be used to demonstrate short-scale and long-scale contrast?&#10;A) Stepwedge&#10;B) Scale of contrast&#10;C) Penumbra&#10;D) Scale darkness

Accepted Answer

A device known as a stepwedge can be used to demonstrate short-scale contrast and long-scale contrast.

Question 8

What is the fuzzy or blurred area that surrounds an x-ray image?&#10;A) Latent period&#10;B) Halo&#10;C) Umbrella&#10;D) Penumbra

Accepted Answer

Penumbra can be defined as the unsharpness, or blurring, of the edges.

Question 9

The film layer that contains the latent image is the:&#10;A) adhesive.&#10;B) base.&#10;C) protective.&#10;D) emulsion.

Accepted Answer

When a processed dental film is viewed against a light source, the relative transparency of areas on the image depends on the distribution of black silver particles in the emulsion.

Question 10

If the mA is increased and the exposure time is kept constant, the resulting films will:&#10;A) be lighter.&#10;B) be darker.&#10;C) remain the same.&#10;D) have a herringbone pattern.

Accepted Answer

If the milliamperage is increased, the density increases, and the image appears darker.

Deck 7: Film Processing and Dental X-Ray Image Characteristics