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DARKROOM AND FILM
UNIT 3
| Question | Answer |
|---|---|
| Neutralizes the developer (activator) | Acetic Acid |
| Produce shades of gray rapidly | Phenidone |
| Archival quality | Permanence of image |
| Removes undeveloped AgBr (clearing agent) | Ammonium Thiosulfate |
| Antifog agent (restrainer) | Potassium Bromide |
| Produces black tones slowly | Hydroquinone |
| Normal developer temperature | 95 degrees F |
| Controls Oxidation (preservative) | Sodium Sulfite |
| Helps swell gelatin | Sodium Carbonate |
| Fixer in developer | Contamination |
| Shrinks and stiffens emulsion (hardener) | Potassium Alum |
| Dissolves chemicals for use (solvent) | Water |
| Regularly spaced scratches | Guide shoe marks |
| Bending of film | Crescent Marks |
| No X-ray exposure | Blank film |
| Oxidized solutions with air | Aerial oxidation |
| Poor screen film contact | Blurred image |
| Film stacked improperly | Pressure marks |
| Branch or treelike mark | Static |
| Film age expired | Fog |
| Which layer of intensifying screen is closest to the film? | Protective layer |
| Which layer of the intensifying screen is the farthest from the film? | Base |
| What is the term generally used to describe the emission of light from a substance as a result of external stimulation? | Luminescence |
| What is the term specifically used to describe the emission of light during and after external stimulation? | Phosphorescence |
| What is the term specifically used to describe the emission of light during stimulation only? | Fluorescence |
| What is measured by comparing an exposure without an intensifying screen to an exposure with an intensifying screen? | Intensification factor |
| What does the term image noise describe? | An image with noticeable quantum mottle |
| What is the outermost layer of radiographic film called? | Supercoat |
| What are the physical imperfections in the emulsion layer of radiographic film called? | Sensitivity Specks |
| What kind of radiographic film is designed to respond specifically to x-radiation and not to the light emitted from intensifying screens? | Direct exposure film |
| When a film has the emulsion coated on both sides of the base versus one side of the film is referred to as: | Double exposure film |
| What influences the speed of radiographic film? | The number of silver halide crystals in the emulsion and the size of the silver halide crstals |
| What is achieved when the color of light emitted by an intensifying screen matches the color of light a film responds to? | Spectral matching |
| What is the purpose of the intensifying screen? | To reduce the amount of exposure |
| Increasing the thickness of the phosphor layer: | Increases speed, decreases recorded detail, and decreases patient dose |
| What is used to assess screen film contact? | Wire mesh test tool |
| The front or tube side of radiographic cassettes should be made of a material that: | Absorbs very little of the x-ray beam |
| At what stage does the process of removing unexposed and undeveloped silver halide from the emulsion occur: | Fixing |
| What is the component of the developer solution responsible for the gray areas on the image? | Phenidone |
| What component of the developer solution helps control the hardening of the emulsion? | Glutaraldehyde |
| What is the chemical in the developer solution that softens the emulsion? | Sodium Hydroxide |
| What is the chemical in the developer solution that controls aerial oxidation? | Sodium Sulfite |
| What is the chemical in the developer solution responsible for the black tones on the image? | Hydroquinone |
| What is the reducing agent in the developer solution? | Hydroquinone |
| Whatis the preservative agent in the developer solution? | Sodium Sulfite |
| What is the restrainer in the developer solution? | Potassium Bromide |
| What is the solvent in the developer solution? | Water |
| What is the hardener in the developer solution? | Glutaraldehyde |
| What is the reducing agent in the developer solution? | Phenidone |
| What is the activator in the fixer solution? | Acetic Acid |
| What is the hardener in the fixer solution? | Aluminum Chloride |
| What is the fixer in the fixer solution? | Ammonium Thiosulfate |
| What prevents oxidation in the developer solution? | Sodium Sulfite |
| What stops development of the film? | Acetic Acid |
| If film begins to yellow after being in storage for a long time, there might be a problem with which stage of the processing cycle? | Wash |
| What removes excess chemistry from the film prior to its entering into the next tank in the processor? | Squeegee roller |
| Which rack system guides the film from one tank into the next? | Crossover rack |
| Which system best achieves agitation, continuous mixing, and filtration of the processing solutions? | Circulation system |
Created by:
jhasenstab
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