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chapter 7
| Question | Answer |
|---|---|
| The component of an x-ray film described as “a thin transparent coating that is placed over the emulsion” is termed: | Protective layer |
| The component of the x-ray film described as “a flexible piece of plastic that withstands heat, moisture, and chemical heat” is termed: | Base |
| The chemical compounds that change when exposed to radiation or light are termed: | Silver halide crystals |
| The invisible pattern of stored energy on the exposed film is termed: | Latent image |
| Dental x-ray film that is placed inside the mouth and used to examine the teeth and supporting structures is termed: | intraoral |
| The identification dot on the intraoral film is significant because it: | indicates the patient’s right or left side, determines film orientation, is important in film mounting |
| One advantage of a film with an emulsion coating on both sides (double-emulsion film) is that: | the film requires less radiation exposure to make an image |
| The purpose of a lead foil sheet in the film packet is to: | protect the film from backscattered radiation |
| Which is not found on the label side of the film packet? | expiration date |
| Which film size is known as the standard film? | 2 |
| Which is the largest intraoral film size? | 4 |
| The film characteristic that is “the amount of radiation needed to produce a radiograph of standard density” is: | speed |
| The speed of a film is determined by the size of the silver halide crystals in the emulsion. Identify the true statement: | The larger the crystals, the faster the film speed |
| A film that is placed outside the mouth during x-ray exposure is termed: | extraoral |
| A screen film is more sensitive to fluorescent light than to direct exposure to x-rays. | True |
| Nonscreen extraoral film is commonly used in extraoral radiography. | False |
| The device that transfers x-ray energy into visible light is termed a(n): | intensifying screen |
| The intensifying screen that emits green light and must be used with green-sensitive film is termed: | rare earth |
| The device used to hold the extraoral film and intensifying screens is termed a: | cassette |
| Cassettes are available in sizes that correspond to film and screen sizes. | true |
| Which results if the intensifying screen is not in perfect contact with the screen film | A loss of image sharpness occurs. |
| Which statement about the duplicating film is false? | It may be placed intraorally or extraorally. |
| Identify the ideal temperature and humidity levels for film storage: | 50°F to 70°F; 30% to 50% |
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