TEST PREVIEW

  1. The production of digital images requires a process called Analog to Digital Conversion. Digital images consist of pixels organized in a matrix of rows and columns.
  1. Depending on the radiographic film used in the dental practice, radiation exposure time can be reduced as much as _____% when changing from radiographic film to digital sensors.
  1. Digital imaging reduces the amount of radiation to the patient due to the sensitivity of the sensors.
  1. The digital images are composed of pixels or rows and columns of images aligned to represent the intensity (gray level) of the image. There is a value assigned to each pixel that represents the intensity or gray level of each location in the image.
  1. Standard radiation safety procedures still require the dental provider be at least _______________ from the x-ray tubehead and the patient be covered in a lead apron with a thyroid collar.
  1. The silicon chip detector converts x-ray photons into an electrical charge. The electrons produced are deposited into small boxes called _______________.
  1. Despite proper care and handling of PSP plates, loss in spatial resolution may occur. To reduce PSP plate deterioration resulting in surface damage and contamination, PSP plates should be handled carefully and cleaned according to manufacturer instructions.
  1. If contaminated, the CDC recommends an EPA-registered _______________ disinfectant after removing the barrier and before using the sensor on the next patient.
  1. With digital imaging, barriers must be placed on the sensors. Sensors cannot be sterilized.
  1. One recent research study found a degradation in spatial resolution after the same PSP plates had been used ______ times.
  1. Signs of malfunction of the laser scanner include lines across the image due to _______________.
  1. Some of the primary reasons to replace PSP plates are _______________.
  1. Digital imaging uses up to _____ shades of gray compared radiographic film that shows only 16-25 shades of gray. This allows for better detection of disease.
  1. What is/are the advantage(s) of digital imaging?
  1. What is/are the disadvantage(s) of digital imaging?