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DEN 112

Radiology Final

QuestionAnswer
Less Sensitive Mature Bone, Salivary Glands, Liver
No. 0 Child Size
Partial Image The film is the result of film placement in the processing tanks when he solution levels are low
Fogged Film Have a gray appearance, image detail is lost, & contrast is lessened
Film Artifacts Images found on the x-ray other than normal anatomy & pathology
Dark Film Can be caused by overdeveloping, the developing solution temperature being too high, the developing solution being too strong, or the film being left in the developer too long
Cephalometic Radiography/Specialty (head measurement) are used to assess the patient's skeletal structure & profile mainly by orthodontics in treatment planning for their patients
Advantages of using digital radiography -Less exposure to radiation for the patient -Results appear on the computer monitor almost immediately after exposure to x-rays -Patients can view images when the dentist is discussing areas of concern -Digital images are stored on computer media,
Advantages of using digital radiography part 2 -Darkroom, processing equipment, & solution are eliminated, thereby, eliminating maintenance of that equipment & the need to deal w/ storage of used chemical -Digital images are quickly & easily sent via email attachment to other dental offices, insuran
Digital Data Files Sent to insurance, other offices
Vertical Bitewings Requested by the periodontist as well as the general dentist w/ the increase in periodontal disease, are requiring bite-wing radiography that show more of the root area. Can be used in both the posterior & anterior areas
Lead Diaphragms Collimator-is a lead disc w/ an opening in the middle that restructures the beam & filters out additional weak rays
Latent Period Period between direct exposure & the development of the biological effects
Hydroquinone Chemical used in development of radiography; a reducing agent use to blacken exposed silver halide crystals
Large Crystals Emulsions Crystal size in the emulsion regulates the speed of the film. The larger the film the faster the film. In-Sight requires 60% less exposure time. F-speed film
Daylight Loader Processors can be placed wherever they are convenient to use
Overlapping Caused by incorrect horizontal angulation, when. The cone is angled toward the mesial or the distal surfaces of the teeth instead of the interproximal areas
Foreshortening Vertical angulation error. Caused by too much angulation
Kilo voltage Determines the quality or penetrating power of the central beam. The higher the KV the greater the penetration power of the x-rays & the less exposure time required.
Duplicate Radiography Dental x-rays can be duplicated so that the originals never leave the office. Needs to be send to specialists
Inventor of X-rays Wilhelm Conrad Roentgen
MPD/ Worker-(maximum permissible dose) Dose limit of occupational exposure to be at 0.05Sv (5.0 rems) per yr
Elongation Vertical angulation error, caused by too little angulation
Labial Mounting Film pack placed w/ raised dot is toward the x-ray tube (toward PID)
Occlusal Radiograph Show a large area of thru dental arch. Used w/ children when periapicals are difficult to expose & w/ patients who have difficult opening the mouth or controlling muscular movement.
Bisecting Angle Perpendicular to the bisecting line
Light film image To be under processed, developing time was too short.
Herringbone Pattern Placing the film in the mouth backward or reversed causes the film to be light and a tire track appears
Contrast Is the difference between shades of gray. Densities of adjacent areas on a film
Periapical Radiographs Pictures the entire tooth & surrounding area. Used to assess the health of the teeth, bone,& erupting stages
Insight Dental Film is an F-speed film that reduces radiation exposure up to 60%
Film Sensitive Stray Radiation, high temperature high or low, & chemicals
Disadvantages of Digital Radiographs -Initial Expense of Equipment & software -Extra time is required to be proficient in hardware and software -Learning cure in diagnosing & reading Digital -Sensors are usually Thicker -Rapid vastly updating , computer virus, and system failure -Infect
Cone Cutting Means that the x-ray beam missed part of the film, causing the film to be only partially exposed
Brown Staining Film are usually caused by improper or insufficient washing/rinsing of the film during the processing sequence
Extra oral Cassettes liners Intensifying screens
Digital/Image Sensor Sizes 0,1,2,4. Some of the sensors are thick, bulky, Rigid while others are thin and flexible.
Panoramic Radiography Take a radiography that shows the entire maxilla & mandible on one film
Bite-wing Radiography Picture the crown, the interproximal spaces & the crest area of the alveolar bone of both the mandibular teeth. Only on posterior teeth, are used to detect caries, faulty restorations, & calculus, and to examine the crystal area of the alveolar bone
Milliampearage (mA) Determines the amount or quantity of electrons. Mill (1/1000) amperage is a measurement unit for electrical current
More Energy Short wavelength; high frequency
Shades of Gray Monitor and Human Eyes Monitor-over 200 shades of gray Eyes- around 32 shades of gray
X-ray machine A conventional x-ray machine is used w/ digital radiograph 70KV
Density Is the degree of darkness
Hittlorf-Crookes Tube Cathode ray tube
Blurred Image Result from movement of the patients head or tube head or from the x-ray film moving in the patients mouth
Streaks on film May result from unclean rollers when using automatic processors or from unclean x-ray racks
Lingual Mounting Depressed dot (concave) dot away from operator
Focal Trough Image layer or sharpness
Primary radiation Central beam that comes from the x-ray tube head.
Secondary radiation When primary x-ray strike the patient or contact matter (any substance)
Scatter radiation Deflection from its path as it strikes matter.
Leakage radiation Escapes in all directions from the tube or tube head
Control panel Where the circuit boards and controls that allow the operator to adjust the correct setting for each patient are located
Most Sensitive Lymphoid, Reproductive Cells, Bone Marrow, Intestinal Epithelium, Thyroid
Moderate Sensitive Skin, Intestinal Tract, Oral Mucosa
Sensitive Connective Tissue, Growing Bone
No. 1 Narrow Size
No. 2 Adult Size
No. 3 Long bite-wing size
No. 4 Occlusal Size
Double Exposure Results in indistinct images or dark x-rays. Examine the film closely and two images can be seen.
Clear film No image on the film, film may not have been exposed.
3-D imaging Immediate 3-D reconstruction of a patient's mouth, face and jaw areas including candles and surrounding structure.
Hand-held Intraoral radiography Another new technology, machines are battery operated
Automatic processing temps Between 82F and 95F
What is digital imaging
Periapical film over occlusal or incisal edge
Paralleling technique
Bisecting- central beam
Principal of panoramic radiagraphy
Created by: emontiel2010
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