dental radiology 1050 ch 10 quality assurance in office

  1. quality assurance
    special procedures taht are used to ensure the production of high quality diagnostic radiographs
  2. quality assurance control tests
    dental x-ray machines, dental xray film, screens and cassettes, viewing equipment, darkroom lighting, processing equipment, processing solutions
  3. dental xray machines quality control
    • calibrated adjusted for accuracy - yearly
    • annual testing identifies: minor malfunctions which are: machine output variations, inadequate collimation, tubehead drift, timing errors, inaccurate kilovoltage and milliamperage readings
  4. Dental x-ray film quality assurance
    • test each box for freshness. process one film
    • fresh film: appears clear with slight blue tint
    • fogged film: appears fogged, causes include - expired film, improper storage, exposed to radiation
  5. Screens quality assurance
    examine for dirt or scratches, cleaned monthly with recommended cleaners, antistatic solution applied, replace if visibly scratched
  6. cassettes quality assurance
    • examine for worn closures, light leaks, and warping which results in fogged or blurred radiographs so you repair or replace
    • examine for film-screen contact: wire mesh test = adequate contact or inadequate contact
  7. viewing equipment quality assurance
    should emit a uniform and subdued light: examine for dirt and discoloration of plexiglass surface, wipe daily, replace discolored plexiglass, replace blackened fluorescent bulbs
  8. film processing quality assurance
    most critical because it can result in a large number of nondiagnostic film
  9. dark room lighting quality assurance
    • examine dark room for light leaks: around door, seams of the walls and ceiling, vent areas, keyhole. if light leaks are visible correct with weather stripping or black tape
    • coin test (safelight test): turn off lights including safelight, place coin on unexposed film for 3-4 min, process (proper/improper safelighting)
  10. processing equipment quality assurance
    • monitored daily- water circulation, solution levels, replenishment system, temperatures
    • two film test: expose one to light, process both films (functioning/nonfunctioning (clear, black, dry)
  11. processing solutions quality assurance
    we don't do this because ours do it automatically however if it is manual you replenish daily and change every 3-4 weeks. evaluate daily before patient films are processed
  12. developer strength quality assurance
    • reference radiograph: processed under ideal conditions and then used to compare the film densities of radiographs processed daily
    • stepwedge radiograph: process one of twenty exposed radiographs under ideal conditions. run one each day and compare to original
  13. fixer strength quality assurance
    when a fixer is at full strength, a film should clear within 2 minutes. clearing test so put film in fixer solution and if it clears in 2 minutes fixer is good
  14. digital imaging quality assurance
    • annual testing for calibration of imaging equipment
    • receptors (direct/indirect) scratching bending wear-and-tear, wire connections
    • commercial kits: cycle effciency, image retention, sensitivity, uniformity, scaling errors, blurring artifacts and resolution
  15. quality administration procedures
    • description of the plan
    • assignment of dutes, monitoring schedule, maintenance schedule, record-keeping log, plan for evaluation and revision, in-service training
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dental radiology 1050 ch 10 quality assurance in office
chapter 10 quality assurance in office