Final Exam Study Guide (pt. 1).txt

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Final Exam Study Guide (pt. 1).txt
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imaging final review radiology
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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)
  33. What type of incident occurs when the incident electron ejects a k-shell eletron from an atom of tungsten?
    A. Bremmstrahlu
    B. Leakage
    C. Characteristic
    D. Off focus
    C. Characteristic
    (this multiple choice question has been scrambled)
  34. What determines the energy of the photon produced in a bremmstrahlung interactions
    A. The SID
    B. The length of the exposure
    C. The amount of energy lost when the incident electron interadts with an inner shells electron?
    D. The amount of energy lost as the incident electron bends around the nucleus
    D. The amount of energy lost as the incident electron bends around the nucleus
    (this multiple choice question has been scrambled)
  35. A characteristic interaction will not occour unless the kvp is set for what amount?
    A. 80
    B. 70
    C. 85
    D. 69.5
    D. 69.5
    (this multiple choice question has been scrambled)
  36. The diagnostic x-ray is mostly composed of which interactions?
    A. Leakage
    B. Off-focus
    C. Characteristic.
    D. Bremmstrahlung
    D. Bremmstrahlung
    (this multiple choice question has been scrambled)
  37. The average primary beam photon has an average energy (kev) of only about....
    A. 30-50% of the kvp
    B.15-30% kvp
    C. 30-40% of the kvp
    D. 60.80%kvp
    C. 30-40% of the kvp
    (this multiple choice question has been scrambled)
  38. When the kvp is increased, what is the effect on the emission spectrum?
    A. Decrease in enregy (amplitude) of photons.
    B. Increase in quantity of photons onl
    C. Decrease in quantity of photons
    D. Increease in energy (amplitude) and the quantity of photons
    D. Increase in energ (amplitude) and the quantity of photons
    (this multiple choice question has been scrambled)
  39. What type of effect becomes evident in the off-spring of the individual?
    A. Genetic
    B. Particulate
    C. Manmade
    D. Smatic
    A. Genetic
    (this multiple choice question has been scrambled)
  40. Which of the following account of the largest source of man-mad radiation?
    A. Nuclear fuel production
    B. Radon
    C. Cosmic
    D. Medical x-rays
    D. Medical x-rays
    (this multiple choice question has been scrambled)
  41. What field survery instrument is commmonly employed for the measurement of the primary and secondary radiation beam for purposes of the evaluiation of equipment performance?
    A. Geiger-mueller survey instruments
    B. Ioniziation chamber instruments.
    C. Personnel monitoring
    D. Scintilation detection devices
    B. Ionization chamber instruments
    (this multiple choice question has been scrambled)
  42. A device that is employed for detection and measurement of radiation exposure from x-radiation is called a...
    A. Primary barrier
    C. Densitometer.
    B. Dosimeter
    D. Filter
    B. Dosimeter
  43. Which type of ionizing radiation is considered electronmagnetic?
    A. X-radiation
    B. Beta
    C. Fast neutrons
    D. Alpha
    C. Fast neurons
    (this multiple choice question has been scrambled)
  44. Which of the following is capable of measuring dose as low as I mrem?
    A. Thermoluminsecent dosimeter ( TLD)
    B. Film-badge
    C. Optically stimulated luminescense (OSL dosimeter )
    D. Pocket dosimeter
    C. Optically stiumlated luminescense (OSL dosimeter)
    (this multiple choice question has been scrambled)
  45. Which of th following contain lithium floride crystals?
    A. Pocket dosimeter
    B. Optically stimulated luminesences (OSL dosimeter)
    C. Thermoluiscen dosimeter (TLD))
    D. Film-badge
    C. Thermolument dosimeter (TLD)
    (this multiple choice question has been scrambled)
  46. Which of the device is worn temporarily and provies no permanent record of radiation exposure?
    A. Thermoluminescent dosimeter
    B. Optically stiumlated lumisecense (OSLdosimeter)
    C. Film badge
    D. Pocet dosimeter
    D. Pocket dosimeter
    (this multiple choice question has been scrambled)
  47. Which of the following uses a laser light to stimulate crystals to become lumisecent in proportion to the amount of radiation received?
    A. Thermoluminecenet dosimeter (TLD)
    B. Optically stimulated luminescense (OSL dDosiemter)
    C. Pocket Dosimeter
    D. Film-Badge
    B. Optically stimulated luminesnce (OSL Dosimeter)
    (this multiple choice question has been scrambled)
  48. Which of the following is NOT read and recorded in mrem?
    A. Film badge
    B. Pocket dosimeter
    C. Optimally stimulated lumiesence (OSL dosmiter)
    D. thermoluminesecent dosmimter (TLD)
    B. Pocket dosimeter
    (this multiple choice question has been scrambled)
  49. What is the formua to determine rem?
    A. Rad x roentgen =
    B. Rad x quality factor
    C. Rad x 100 =
    D. Rad x rectification constant
    B. Rad quality factor
    (this multiple choice question has been scrambled)
  50. What represent the unit of absorbed energy or dose and is applicable to any material?
    A. Coulombs per kilogram
    B. Rad.
    C. Roentgen
    D. Rem
    B. Rad
    (this multiple choice question has been scrambled)
  51. What unit represents the unit of exposure in air
    A. Gray
    B. Rad
    C. Roentgen
    D. Rem
    C. Roentgen
    (this multiple choice question has been scrambled)
  52. Personnel monitoring is recommended whenever a possibility exist that an individua will receive mroe than ____ of the recomended dose limit as a result of his or her occupational activities.
    A. 1/100
    B. 15
    C. 1/10
    D. 1/2
    C. 1/10
    (this multiple choice question has been scrambled)
  53. Which fo the following causes the least ionization per unit length of measurement
    A. Alpha
    B. X-ray
    C. Fast neurons
    D. Beta
    B. X-ray
    (this multiple choice question has been scrambled)
  54. Which of the following is the most penetrating?
    A. Alpha
    B. Beta
    C. X-ray
    D. Fast electrons
    C. X-ray
    (this multiple choice question has been scrambled)
  55. True or false: somatic effect becomes evident in the irradiated individual
    True
  56. True or false: Radon accounts forr the largest source of natural radiation exposure
    True
  57. True or False: To acount for thefact that the same absorbrd dose of radiation amy result in different biological responeses for different typtes of radiation, a unit known as the rem was developed.
    True
  58. True or false: both film badges and tlds ca be adversely affectd by heat, humidity, pressure, inadvertent exposure to light and prolonged delay between exposure and processing.
    True
  59. Lead aprons mst be ade of a minimum of ____mm pb/eq if the peak energy of the beam is 100 kVP
    A. .50
    B. .30
    C. .25
    D. 1.00
    A. .50
    (this multiple choice question has been scrambled)
  60. Primary barriers must be ____ inces pb/eq thick and ____ to the primary beam
    A. 1/16 parallel
    B. 1/32 parallel
    C. 1/16 perpendicular
    D. 1/32 perpendicular
    C. 1/16 perpedicular
    (this multiple choice question has been scrambled)
  61. Which of the following would best reduece occupational dose?
    A. Decreaes in collimation
    B. Decrease in filtration
    C. A increase in distance
    D. Increase in mAs
    C A increase in distance
  62. The control booth is considered a _________barrier
    A. Scattered
    B. Primary
    C. Ineffective
    D. Secondary
    B. Primary
    (this multiple choice question has been scrambled)
  63. The wall that the wall bucky is attached to is considred a ____________barrier
    A. Primary
    B. Secondary
    A. Primary
  64. Which of the following is NOT true when considering a stochastic effect?
    A. It includes gentic effects, most cancer and life span is shrotening
    B. It has no threshold
    C. Its also called a probalistic effect
    D. Its also called a deterministic effect
    D. Its also called a determnistic effect
    (this multiple choice question has been scrambled)
  65. What effect inrease in severity as dose increases?
    A. Stochastic
    B. Non-stochastic
    B. Non-stochastic
  66. What are thhree principles ( or cadinal rules) of personnel exposure?
    A. Time, distannce shielding
    B. Time, shielding, density
    A. Time distance shielding
  67. What does ALARA stand for?
    As low as reasonablly achievable
  68. When the distance fro ma source of radiation is doubled, the amount of radiation expsoure is
    A. Increased 4 tmes
    B. Decease by half
    C. Decrease four imes
    D. Inreased by half
    C. Decrease four times
    (this multiple choice question has been scrambled)
  69. Lead thyroid shield and lead gloves usually possess of a mnimum of ____________ mm pb/eq.
    A. 1.5
    B. .50
    C. .25
    D. 2.5
    C. .25
    (this multiple choice question has been scrambled)
  70. Annual EDLfor a student to their skin, hands and feet (nonstochastic)
    A. 50 rem
    B. 1.5 rem
    C. 2.5 rem
    D. 5 rem
    A. 50 rem
    (this multiple choice question has been scrambled)
  71. Annual EDL for an occupational worker (stohastic)
    A. 1 rem
    B. 10 rem
    C. 15 rem
    D. 5 rem
    D. 5 rem
    (this multiple choice question has been scrambled)
  72. Annual edl for education and training exposure (stochoastic)ad general public.
    A. 1 rem
    B. .1 rem
    C. 5 rem
    D. 10 rem
  73. Guidance: cumulative exposure for a 5 year old occoupational worker:.
    A. .25
    B. 25.
    C. 30
    D. .025
    B. 25
    (this multiple choice question has been scrambled)
  74. Annual EDL for an occupational worker to the lens of the eye: (rem)
    A. 15
    B. 35
    C. 1.5
    D. 5
    A. 15
    (this multiple choice question has been scrambled)
  75. EDL to the embryo-fetus exposures for a pregnant radiographre for the month (rem)
    A. 50
    B. .05
    C. .5
    D. 0.01
    .05
  76. Annual EDL for an occupational worker to the skin, hands and feet: (rem)
    A. .5
    B. None
    C. .50
    D. 50
    D. 50 rem
    (this multiple choice question has been scrambled)
  77. Annual EDL for a student to te lens of the eye: (rem)
    A. 10
    B. 25
    C. 30
    D. 1.5
    D. 1.5
    (this multiple choice question has been scrambled)
  78. Total: ( during the entire gestation period)EDLfor embryo-fetus exposure for ap regnant radiogrpaher ( rem )
    A. 10 rem
    B. .5 rem
    C. 50 rem
    D. 5 rem
    B. .5 rem
    (this multiple choice question has been scrambled)

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