Term
| the component part of the x-ray film described as a flexible piece of polyester plastic is the: |
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Definition
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Term
| which of the following terms describes the crystals found on the intensifying screens? |
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Definition
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Term
| the device used to hold the extraoral film and intensifying screens is termed a: |
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Definition
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Term
| which of the following is not found on the non-tube side of the intraoral film packet? |
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Definition
|
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Term
| what is the ideal storage temperature for x-ray film? |
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Definition
| from 50-70 degrees farenheight |
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Term
| the purpose of a lead foil sheet in the film packet is to: |
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Definition
| protect the film from backscatter radiation |
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Term
| Which of the following films has the greatest sensitivity to radiation? |
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Definition
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Term
| the speed of a film is determined by the size of the silver halide crystals in the emulsion. Identify the true statement. |
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Definition
| the larger the crystals, the faster the film speed |
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Term
| Intensifying screens are used to |
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Definition
| reduce amount of radiation required |
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Term
| which of the following is contained in the film emulsion? |
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Definition
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Term
| lateral jaw is an example of this film |
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Definition
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Term
| cephalometric is an example of this film size |
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Definition
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Term
| panoramic is an example of this size film |
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Definition
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Term
| anterior/pediatric (6-8 yrs) bitewings |
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Definition
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Term
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Definition
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Term
| posterior periapical/ bitewings |
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Definition
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Term
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Definition
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Term
| pediatric (3-5 yrs) anterior/ bitewings |
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Definition
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Term
| Ultraviolet or infrared light sensitive |
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Definition
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Term
| accommodates not having to duplicate films |
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Definition
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Term
| the phosphor crystals used for intensifying screens that works 4 times faster are |
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Definition
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Term
| what is a single sheet placed within the film packet that prevents backscatter radiation from fogging the film? |
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Definition
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Term
| what is a film that is more like photographic film and is used to make copies of films |
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Definition
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Term
| a coating, attached to both sides of the film by the adhesive layer. the silver halide crystals and gelatin are suspended in |
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Definition
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Term
| a chemical compound (?) used for conventional film that is sensitive to radiation or light |
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Definition
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Term
| the pattern of stored energy on the exposed conventional film that cannot be seen until chemical processing has been accomplished is called the |
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Definition
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Term
| with digital radiography, the term (?) is used to describe the pictures that are produced |
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Definition
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Term
| the method of obtaining a digital image similar to scanning a photograph to a computer screen is termed |
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Definition
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Term
| digital imaging systems can be used for: |
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Definition
| bitewing, panoramic, periapical, cephalometric |
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Term
| all of the following are advantages of digital imaging except |
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Definition
| thickness of the intraoral sensor |
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Term
| most digital radiography systems use a (?) as the radiation source |
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Definition
| conventional dental x-ray unit |
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Term
| digital imaging can be used for: |
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Definition
| detecting conditions of teeth and surrounding structures, evaluating the growth and development, confirmation of suspected conditions |
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Term
| radiographic images are cleared from the storage phosphor imaging plates (psp) by |
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Definition
| exposing them to an intense light for several minutes |
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Term
| photo-stimuable phosphor imaging |
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Definition
| uses a reusable imaging plate |
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Term
| the image receptor found in the intraoral sensor is termed |
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Definition
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Term
| WHen a transparency scanner or digital camera is used to convert an existing film-based radiograph to a digital file, the process is called |
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Definition
|
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Term
| exposure times are (?) than that required for conventional film |
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Definition
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Term
| digital imaging requires less radiation than does conventional radiography because |
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Definition
| the sensor is more efficient at capturing radiation |
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Term
| advantages of digital radiography include |
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Definition
| increased speed of image viewing |
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Term
| a primary advantage to digital radiography is the superior gray-scale resolution that results. digital radiography uses up to 32 shades of gray. |
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Definition
| the first statement is true, the second is false |
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Term
| a small detector that is placed intraorally to capture the radiographic image |
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Definition
|
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Term
| an image receptor that is found in the intraoral digital sensor |
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Definition
| charged-coupled device (CCD) |
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Term
| a form of indirect digital imaging in which the image is recorded on a phosphor coated plate and then placed into an electronic processor, and laser scanned to produce an image on a computer |
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Definition
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Term
| to convert an image into digital so that in turn can be processed by a computer |
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Definition
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Term
| a filmless imaging system; a method of capturing a radiographic image using a sensor, breaking the image into electronic pieces, and presenting and storing the image using a computer |
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Definition
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Term
| a discrete unit of information; a picture element |
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Definition
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Term
| a method of obtaining a digital image, in which an existing radiograph is scanned and converted into a digital form using a CCD camera |
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Definition
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Term
| a method of reversing the gray scale as a digital image is viewed |
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Definition
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Term
| a method of obtaining a digital image in which an intraoral sensor is exposed to x-rays to capture a radiographic image that can be viewed on a computer monitor |
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Definition
|
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Term
| sensors that cannot be sterilized |
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Definition
| require complete coverage with disposable plastic sleeves or barriers for each patient and require wiping with disinfectant before and after use with a patient |
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Term
| digital radiography uses (?) to produce an image |
|
Definition
| an electronic sensor and computerized imaging system |
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Term
| which of the following dedescribes the relationship of the central ray to the film and long axis of the tooth in the paralleling technique? |
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Definition
| 90 degrees to the film and long axis of the tooth |
|
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Term
| which of the following describes the distance between the film and tooth in the paralleling technique? |
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Definition
| the film is placed away from the tooth, toward the middle of the oral cavity and parallel to the long axis of the tooth |
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Term
| which of the following are advantages of the paralleling technique? |
|
Definition
| increased accuracy, simplicity of use, ease of standardizing |
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Term
| in the paralleling technique, the x-ray beam must be perpendicular to the tooth and film in order to minimize |
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Definition
|
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Term
| to achieve parallelism between the film and the tooth, the (?) distance must be increased to keep the film parallel with the long axis of the tooth |
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Definition
|
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Term
| according to the text, size 1 film is positioned with the long portion of the film in a (?) direction, and size 2 film is positioned with the long portion of the film in a (?) direction for periapical films |
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Definition
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Term
| what shadow casting principle is NOT likely to be met when utilizing the paralleling technique? |
|
Definition
| object and image receptor should be as close as possible to each other |
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Term
| when the bisecting technique is used, the film must be placed along the (?) surface of the tooth |
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Definition
|
|
Term
| when the bisecting technique is used, which of the following angles is bisected? |
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Definition
| the angle formed by the film and the long axis of the tooth |
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Term
| when the bisecting technique is used, the central ray is directed 90 degrees to the: |
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Definition
|
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Term
| according to the authors of your textbook, in the bisecting technique, film-holding instruments or the patient's finger may be used to position and stabilize the film. with the bisecting technique, using film holders is recommended because it eliminates use of the patient's finger to stabilize the film |
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Definition
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|
Term
| the primary benefit of using film holders with the bisecting technique is: |
|
Definition
| reducing patient's exposure to radiation |
|
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Term
| foreshortened images refer to images of the teeth that appear (?). foreshorenting of images results from (?) vertical angulation |
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Definition
|
|
Term
| when the bisecting technique is used, foreshortening will occur if the central ray is directed perpendicular to the |
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Definition
|
|
Term
| elongated images refer to images of the teeth that appear (?). elongation of images results from (?) vertical angulation. |
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Definition
|
|
Term
| the primary disadvantage of the bisecting technique when contrasted with the paralleling technique is: |
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Definition
|
|
Term
| the disadvantages of the bisecting technique outweigh the advantages. therefore, the paralleling technique is preferred over the bisecting technique for exposure of periapical films and should be used whenever possible |
|
Definition
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|
Term
| the primary diagnostic use of horizontal bitewing x-rays is to view: |
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Definition
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|
Term
| to view areas of moderate to severe bone loss, the hygienist would decide to take which type of film series? |
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Definition
|
|
Term
| which of the following is the correct vertical angulation used with the bite-wing technique if you are using cardboard tabs? |
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Definition
|
|
Term
| incorrect horizontal angulation causes: |
|
Definition
| overlapped images because the lingual aspect of one tooth is superimposed on the facial aspect of the adjacent tooth |
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|
Term
| the occlusal technique is used to examine: |
|
Definition
| large areas of the upper or lower jaw |
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|
Term
| which occlusal projection is used to locate foreign bodies or salivary stones in the region of the floor of the mouth? |
|
Definition
| cross-sectional occlusal projection |
|
|
Term
| for the maxillary topographic occlusal projection, the central ray is directed at: |
|
Definition
|
|
Term
| in adults, size (?) film is used in the occlusal examination |
|
Definition
|
|
Term
| the geometric characteristic of (?) refers to the capability of the x-ray film to reproduce the distinct outlines of an object |
|
Definition
|
|
Term
| which of the following influencing factors would degrade film sharpness? |
|
Definition
| long source to object distance, larger focal spot |
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|
Term
| which of the following choices would result in increased magnification of the radiographic image? |
|
Definition
| increased object-film distance |
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|
Term
| a longer position-indicating device (PID) results in? |
|
Definition
| more image magnification than when a shorter PID is used |
|
|
Term
| to minimize dimensional distortion, the object and film must be (?) one another |
|
Definition
|
|
Term
| what term best describes a fuzzy shadow around the outline of the radiographic image? |
|
Definition
|
|
Term
|
Definition
| object and image receptor are not parallel |
|
|
Term
| assigned responsibilities of dental auxiliaries in regard to dental radiography may include |
|
Definition
| mounting and identification of radiographs, implementation and monitoring of quality control procedures, education of patients about dental radiography |
|
|
Term
| the (?) intraoral radiographic examination is used to examine the entire tooth (crown and root) and supporting bone |
|
Definition
|
|
Term
| which of the following methods is/ are used for obtaining periapical radiographs? |
|
Definition
|
|
Term
| which of the following is an extraoral technique for radiographic examination? |
|
Definition
|
|
Term
| (?) is an example of a patient protection technique used before x-ray exposure? |
|
Definition
| proper prescribing of radiographs |
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|
Term
| radiographs enable the dental professional to see (?) conditions that may otherwise go undetected |
|
Definition
|
|
Term
| when radiographs are properly prescribed, exposed, and processed, the benefit of disease detection (?) the risk of small doses of x-radiation |
|
Definition
|
|
Term
| inherent filtration in the dental x-ray tubehead |
|
Definition
| includes filtration that takes place when the primary beam passes through the glass window of the x-ray tube, the insulating oil, and the tubehead seal |
|
|
Term
| state and federal laws require that dental x-ray machines operating below 69 kVp have a minimum total (inherent added filtration) of (?)mm of aluminum filtration |
|
Definition
|
|
Term
|
Definition
| restricts the size and shape of the x-ray beam |
|
|
Term
|
Definition
| is recommended for all intraoral films, may exist as a separate shield or as pert of the lead apron, is required to be used on children |
|
|
Term
| on some dental x-ray machines, only the (?) can be altered; the other parameters are preset by the manufacturer. |
|
Definition
|
|
Term
| the primary motto of operator protection guidelines is that the operator must: |
|
Definition
|
|
Term
| radiation legislation varies greatly from state to state. for example, in some states, a dental radiographer must successfully complete a radiation saftey examination before he or she may expose dental x-rays |
|
Definition
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