Chapters 5-9
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Film badge | Aka, Docimeter badge; used to measure levels of radiation
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| Filtration | Absorbing materials for removing low energy xrays from primary bean
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| Inherent filters | When primary beam passes through glass window of xray tube, insulating oil and tubehead
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| Added filters | Aluminum disc inserted in xray machine; absorbs low energy xrays
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| Lead apron/thyroid collar | Shields patient from scatter rays.
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| MAD | Maximum Accumulated Dose; lifetime max radiation dose for those in radiology field
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| Extraoral film | xrays/films take from outside mouth
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| Introral film | xrays/films taken inside mouth
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| Adhesive layer | Thin layer that covers both sides, allows emulsion to adhere to base
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| Bite wing radiograph | Antagonist/Occlusal surface image/xray; showing bite of maxillary & mandibular
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| Cephalometric | Aka Ceph; shows bony soft tissue areas of facial profile. Side profile - TMJ, spine, neck and skull. Use din ortho to measure growth
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| Occulsal | Top surface, biting surface of posterior teeth
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| Panoramic | Wide view
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| Film base | Actual film, flexible plastic
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| Film emulsion | Made of gelatin; coating on both sides of film base; gives film greater sensitivity & shortens exposure time
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| Gelatin | Absorbs and disperse silver halide crystals over film base during processing
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| Silver Halide Crystals/Silver Iodide/Silver Bromide | Chemical that absorbs radiation during xray exposure; small crystals require more radiation=better resolution / large crystals=less radiation
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| Identification dot | Perforated impression/bubble on film; Faces up.
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| Image | Picture
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| Interproximal | In between teeth.
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| Latent image | Stores energy from radiation; Denser objects - more energy absorbed, lighter it appears.
Less dense - appear darker
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| Lead foil sheet | Tin foil sheets inside film pouch; stops xray beams from going through.
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| Intensifying screens | Used to get better images but intensifies x-rays
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| Scale of contrast | Range of useful densities seen on a radiograph
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| Object to film distance | Distance between film and object when taking xrays
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| Target to film distance | Distance of PID to film
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| Distortion | Variation in true size and shape of the object being radiographed
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| Focal Spot | small area converts bombarding electrons into xray photons
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| Magnification | Image appears larger that normal; making image larger
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| Movement | Not staying still; changing positions from original position
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| Penumbra | Un-sharpness or blurring of the edges of radiograph image
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| Radiolucent | Dark or black images on xray; lucent=dark or black
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| Radiopaque | White images on xray; Opaque=white or light
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| Stepwedge | Device used to demonstrate short scale contrast and long scale contrast; looks like a stair case
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| Subject thickness | Size and density of patient will depend on adjustments of kVp & mA (Killovoltage peak and Millamperage
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| Overlapping | 2 films come in contact with each other
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| Foreshortening | Image shows teeth shorter than they are; resulting from excessive vertical angulation
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| Double exposure | Excessive development time, inaccurate timer, hot developer solution or concentrated developer solution; appears dark
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| Conecut | The PID/cone cuts film off; not centered
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| Elongation | Image looks longer than it is; Angulation is too low
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| Acidifier | Used in the fixer solution; aka acetic acid
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| Darkroom | Special room designed for processing films, chemical & supply storage, controlled temp and free of dust and clean and dry; with zero white light.
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| Daylight leader |
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| Developer solution | Reduces the exposed silver halide crystal chemically to black metallic silver; developing agent, preservative, accelerator and restrainer
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| Fogged film | Improper safe lighting/light leaks, outdated films, high developer temp, improper film storage,
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| Scratched film | When soft film emulsion removed and scratched by sharp object; white lines
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| Yellow/brown film | Over used fixer or developer
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| Fingernail mark | fingernails scratched the film
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| Fingerprint artifact | Fingers touched film with fluoride on them
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| Fixer solution | Removes or clear all undeveloped/unexposed silver halide crystals from film emulsion; has 3 ingredients Fixing agent, preservative, hardening agent & acidifier
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| Hardening agent | Used in fixer solution, shrinks and hardens gelatin in film emulsion; Potassium alum
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| Light leak | Light peak through the dark room; exposed areas appear dark
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| Replenisher | Adding fresh fixer/developer to keep levels and keep solutions fresh.
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| Reticulation | Cracked looking film; temp change between developer and water bath
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
cadengel
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