Final Exam Study Guide.txt

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Final Exam Study Guide.txt
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2011-12-07 19:47:42
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radiology imaging
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final study guide for imaging
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    • If the radiograper is unable to adjust the mAs, yet needs to double the radiographic density of a particular film, which of the following would be best to accomplsish this?
  1. A. increase the kvp by 50%
    • B. Increase kvp by 15%
    • C. Decrease SID by 50%
    • D. Inrease SID by 15%
    • B. Increase by 15%
  2. An exposure was made using 400 mA an. 03 sec. In order to maintain the some density, what must the new expsure time be if the ma is changed to 200?

    A. .001 sec
    B. .01 sec
    C. .06 sec
    D. .006 sec
    C. 06 sec
    (this multiple choice question has been scrambled)
  3. Which of the following groups of exposures factors will produce the lowest radiographic contrast?

    A. 300 mA. 03 sec. 115 kVp
    B. 200 mA 0.02 sec 86 kVp
    C. 400. .02 sec 75 kvP
    D. 500 mA. 03 sec 65 kVp
    A. 300 mA. 03 sec 115 kVP
    (this multiple choice question has been scrambled)
  4. ____________ refers to the degree of blackening of an x-ray film.

    A. KVp
    B. Distance
    C. density
    D. Contrast
    C. Density
    (this multiple choice question has been scrambled)
  5. ___________ is a measurement of x-ray tube current ( the number of electrons crossing the tube from cathode to anode per second. )
    Ma (Miliamperage)
  6. When a film demosntrates long scale contrast because of over penetration, the appropriate change to restore a shorter scale of ontrast would be
    A. Increase SID
    B. decrease kvp
    C. Increase mAs
    D. Decrease SID
    B. Decrease kvp
    (this multiple choice question has been scrambled)
  7. An exposure was made using 200 mA, and 0.025 seconds. What is the mAs used fo this exposure?
    A. 50 mAs
    B. 05 mAs
    C. % mAs.
    D.8000 mAs
    C. 5 mAs
    (this multiple choice question has been scrambled)
  8. Radioraph that exhibits many shades of gray may be described as having
    A. Short scale
    B. Good Detail
    C. Long scale
    D. Increased density
    C. Long-scale
    (this multiple choice question has been scrambled)
  9. If 1/30 seconds was selected for a particular exposure, what mA owuld be necessary ot produce 20 mAs?
    A. 500 mA
    B. 900 mA
    C. 600 mA
    D. 300 mA
    C. 600 mA
    (this multiple choice question has been scrambled)
  10. A lateral radiograph of the cervical spine as made at 40"SIDusing 500 mA ad 0/02 seconds. It is desired to use a smaller focal spot size and therefore the technoogist must use a 100 mAstation. What new time would be used to maintain radiographic density?

    A. 10
    B. 1
    C. .01
    D. .1
    D. 0.1
    (this multiple choice question has been scrambled)
  11. True or False: When kvp increases, radiographic contrast decreases.
    True
  12. The relationship of mAs to distance is...
    A. Radiation is inversel proportional to distance.
    B. Radiation is diretly proportional to distance.
    C. Radiation is inversely proportional to the square of the distance.
    D. Radiation is directly proportional to the square of the distance.
    D. Radiatio nis directly propotional to the square of the distance
    (this multiple choice question has been scrambled)
  13. True or False: As distance increases, radiographic density will increase assuming no compensation is made.
    False
  14. ___________refers to the differences in radiographic densities (shades of grgay)on radiograph.
    A. Density
    B. DEtail
    C. COntrast.
    D. MAs
    C. Contrast
    (this multiple choice question has been scrambled)
  15. True or False: X-ray production occurs at the filament
    False
  16. True or False:Photons that escape the tube housing except at the port window are called off-focus raddiation.
    False
  17. True or False: The Anode side of the tube has a positive charge.
    True
  18. True or False:The faster the anode rotation the better the heat dissipation
    True
  19. True or False:Approimately 25-30% of the x-rays exiting htetue are considered off-focus
    True
  20. For which exam would it be appropriate to utilize the anode heel effect?
    A. Femur
    B. Hand
    C. Abdomen
    D. Foot.
    A.Femur
    (this multiple choice question has been scrambled)
  21. Leakage radiation must not exceed...
    A. 10 mRmin at 10 meters
    B. 10 mR/hr at 1 meter.
    C. 100 mR/min at 10 meters
    D.100 mR/hr at 1 meter
    D. 100 mR/hr at 1 meter
    (this multiple choice question has been scrambled)
  22. What permits the electrons to flwo from cathodde toanode without encountering the gas atoms of air?
    A. The precense of a vacuum
    B. Dielectric oil
    C.mAs ad kVP
    D. Lead lined housing
    A The precense of a vacuum
  23. The anode targt surface is composed of______
    A. Calcium tungstate
    B. Graphite
    C. Molybdenumn
    D. Tungsten
    D. Tungsten
    (this multiple choice question has been scrambled)
  24. Normal use of the rotating anode will evnetually vaporize sufficient target focal tract material to...
    A. Cause the stator to fail
    B. Roughen or pit the target area
    C. Cause the tube to shake
    D. Rack the anode.
    B. Roughen or pit hte target area
    (this multiple choice question has been scrambled)
  25. When utilizing the anode heel effect, ____ should be placed under the anode.
    A. Thinner body part
    B. Thicker body part
    A. Thinner body part
  26. The anode heel effet is most ntoiceale with..
    A. Small image reeptor and a long distance
    B. Small iage receptor and a short distance
    C. A large image reeptor and a long distance
    D. Large image receptor and short distance (SID)
    D. Large image receptor and da short distance
    (this multiple choice question has been scrambled)
  27. The term ___________________ is used to describr the area of the focal spot that is projected out of the tube toward the obeject being radiogrraphed
    A. Actual focal spot
    B. Filament
    C. Focal track
    D. Effective focal spot
    C. Focal track
    (this multiple choice question has been scrambled)
  28. Which of hte following best describes the warm up procedurefor an x-ray tube.
    A. Hihg kvp, high ma, short exposure
    B. Moderate kvp, moderate ma, long exposure
    C. Moderate kvp, high ma, long exposure
    D. High kvp, moderate ma, and sort exposure.
    B. Moderate kvp, moderate ma and long exposure time
    (this multiple choice question has been scrambled)
  29. Both filament and focal track are composed of..
    A. Calcum tungstate
    B. Tungsten
    C. Molybdenum
    D. Graphite
    B. Tungsten
    (this multiple choice question has been scrambled)
  30. True or False: The most diganostic target angel is between 7-17 degrees
    True
  31. Acording to the line focus principle, when the target angle is less than 45 degrees, the effective focal spot is always _______ than actual focal spot.
    A. Equal to
    B. Larger than
    C. Smaller than
    C. Smaller than
    (this multiple choice question has been scrambled)
  32. When the switch labeled "rotor or prep" is activated priro to an exposure, the rotor begins to turn and....
    A. Higher current is sent to the filament.
    B. Stator is run in reverse.
    C. X-ray photons are created
    D. Electrons sare released and sent over to the anode.
    A. Higher current is sent to the filament
    (this multiple choice question has been scrambled)

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