Image Production

• Anything that is foreign to the normal radiographic image is called what:

  artifact
• Which of the following materials would NOT be used in the interspaces of a grid:

  lead
• When should a grid be used:

  when radiographing body parts greater than 10 centimeters, when using high kVp, when scatter radiation is high
• What is a major benefit of a fixed kVp technique chart:

  adequate part penetration
• Which of the following is the main determinant in selecting a focal spot size:

  the mA used
• Compared to a low ration grid, a high ratio grid will do which of the following:

  absorb more scatter radiation
• How can a compression band improve radiographic quality:

  reduce scatter radiation, reduce patient motion, improve image contrast
• Which of the following tests will determine the focal spot size:

  star pattern test
• Off-distance grid cut-off is characterized by which of the following:

  both sides of the image are underexposed
• What is the main reason why beam filters are used in radiography:

  reduces patient exposure
• What is the three-demensional radiograph called that is produced by two angled views of the same structure:

  stereoradiograph
• Which of the following is an example of a compensating filter:

  aluminum wedge filter
• How can the production of scatter radiation be reduced:

  use close collimation
• Which of the following is used to reduce the effect of scatter radiation:

  radiographic grids
• How much should kVp be increased when an extension cylinder is used to cone down on an area of interest:

  5 kVp
• A 400 speed class requires how much less radiation than a 200 speed class:

  50 % less
• The image in an image receptor after exposure but before processing is known as what:

  a latent image
• Radiographic quality is achieved by balancing which of the following:

  sharpness of detail and visibility of detail
• Off-center grid cut-off would demonstrate which of these:

  one side of the image would be underexposed
• Which of the following is NOT a primary factor in the production of a radiograph:

  intensification factor
• What is the purpose of a compensating filter:

  produce uniform exposure in an image
• A fixed-kVp technique chart uses which of the following:

  fixed kVp and variable mAs
• Why do the backs of cassettes contain led:

  stops backscatter from fogging the IR
• Subtraction technique is used for which of the following situations:

  angiographic studies
• How many lines per inch are needed for grids that are used with CR:

  greater than 150
• Which of the following grid interspaces will produce the most satisfactory radiograph:

  aluminum
• Which of the following would NOT be classified as a beam restricting device:

  port
• Which of the following causes the most repeated images in an all-digital imaging department:

  positioning errors
• Which of the following statements concerning a 16:1 ratio grid is true:

  effectively absorbs scatter rays, designed for high kVp techniques, has little positioning latitude
• Which of the four primary factor in the production of a radiograph is regarded as the factor of penetration:

  kVp
• The height of the lead strips divided by the distance between the lead strips defines which of the following:

  grid ratio
• What does grid-cut-off mean:

  the primary x-rays are absorbed
• Which of the following conditions will cause grid cut-off with a focused grid:

  central ray not centered to the grid, grid angled, tube angled across the grid
• Grid focusing distance is associated with which of the following:

  focused grids
• Which type of radiographic grid has lead lines running in two directions:

  crossed
• The image after processing I known as what:

  a manifest image
• When mA is increased what must be done to exposure time in order to maintain the same exposure:

  decrease time
• Where is the ionization chamber (photocell) located in an automatic exposure control (AEC) device:

  between the patient and the image receptor
• The distance between the lead strips of a focused grid to a point where all lines coverage is known as what:

  grid focusing distance
• Which of the following is an advantage of the air gap technique:

  eliminates the need for a grid