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Final 21 22 23
Dental Radiography FINAL 07/08/2014
| Term | Definition |
|---|---|
| Wilhelm Conrad Roentgen | He discovered the first X-RAY in 1895 |
| Primary Radiation | Central beam that comes from the X-Ray tubehead |
| Secondary Radiation | When the primary X-Rays hit the patient or contact matter |
| Scatter Radiation | Deflected from its path as it strikes matter. most dangerous to operators, so 6 ft of clearance is necessary |
| Leakage Radiation | leaks in all directions from the tubehead |
| M.P.D (maximum permissible dose) | maximum amounts of radiation that wouldn't be expected to produce any significant effects in a lifetime. Amount is 0.05 SV (5.0 REMs) |
| Dosimeter Badge | Must be worn at all times in the dental office. used t monitors an individuals radiation exposure in the office |
| Kilovoltage | the quality or penetrating power of the central beam. the higher the KV the higher the power |
| miliamperage | the amount or quality of electrons |
| Control Panel | the circuit board and controls that allow the operator to adjust the correct setting for each patient |
| Collimeter | a lead disk with an opening in the middle that reconstructs the beam and filters out additional weak rays |
| Density | the degree of darkness on an X-ray |
| Contrast | The difference between the shades of gray |
| Least Sensitive | kidney, muscle, nerves |
| Less Sensitive | mature bone, salivary glands and liver |
| Moderately Sensitive | Skin, intestinal tract, oral mucosa |
| Most Sensitive | lymphnoid, reproductive cells, bone marrow, intestinal epithelium, thyroid |
| Sensitive | connective tissue and growing bone |
| Film Sensitivity | stray radiation, high temperature, chemicals |
| Cone Cutting | X-Ray beam missed part of the film |
| Elongation | vertical angulation error caused by to little angulation |
| Foreshortening | vertical angulation error caused by to much angulation |
| Overlapping | angled toward the mesial or distal surfaces |
| Dark Film | over developing, developing solution to high/low, solution is to strong or when the film is left in the developer to long |
| Fogged Film | gray image, image detail is lost contrast is lessened |
| Partial Image | film placement in the processing tanks when the solution levels are low |
| Film Artifacts | images found on the X-ray that are not part of the normal anatomy or pathology |
| Clear Film | there is no image on the film caused by no exposure |
| Double Exposure | indistinct images or dark X-ray. can be avoided by keeping the film sperated |
| Blurred Image | movement from the patients head, the tubehead or the X-ray film moving around in the patients mouth |
| Light Film | under processed. can occur while exposing film and during processing |
| Brown Stain | improper/ insufficient washing or rinsing of the film during the processing sequence |
| streaks On Film | unclean rollers or X-ray racks |
| Automatic Processor Temperature | Between 82*-95* degrees F |
| Periapical Views | pictures the entire tooth and surrounding areas. used to assess the health of the tooth, bone and tissues |
| Cephalometric | used to assess the patients skeletal structure and profile |
| Shades Of Gray | a computer can display over 200 different shades but the human eye can only detect 32 |
| Gray Scale | important for determining the condition or the teeth, tissues and surrounding bone |
| Focal Trough | also known as an "image layer" or "sharpness" is a 3D curved zone in which dental arches are positioned to achieve the sharpest image |
| Crystals | the larger the crystals the faster the film |
| Bite-Wing Radiographs | pictures the crown, interproximal space and the crest area of the alveolar bone on the maxilla/mandible teeth |
| Occlusal Radiographs | shows large areas of the dental arch placed on the occlusal surface./ used to locate fractures, impacted teeth, foreign bodies and identifying the ocation of other artificats |
| Tomography | the imaging of one layer or section of the body while blurring images from other areas. the principle of panoramic radiographs |
| Panoramic Radiographs | show the entire maxilla and mandible on one film |
| Intensifying Screens | what the cassettes for panoramic radiographs are lined with. phosphor is used on the screens which emits light when struck y X-rays green are rare earth and blue are calcium tungstate |
| Extraoral Radiograph | used by dentist to identify large areas of the skull on one film |
| Digital Advantages | less radiation to patient, appears on the monitor immediately, patient can view while doctor explains, less space for storage, darkroom, processing equipment, and solution eliminated and easily coppied |
| Digital Disadvantages | the cost, extra time in training, uncomfortable for patient, updates and viruses plus infection control |
| 3D Shows | complete/ partial skull fields of view. used to produce digital panoramic and cephalometric images, 3D photos and CBVT & CBVI |
Created by:
red112409
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