Chapter 6: Exposure Technique Factors
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Q1) A high kVp results in:
A) less absorption and more transmission in anatomic tissues.
B) less variation in the x-ray intensities exiting the patient.
C) increase interactions from Compton scattering.
D) low-contrast image.
E) all of the above.
Q2) During selection of the focal spot size,the radiographer is really determining the:
A) angle of the anode used.
B) actual size of the filament used.
C) energy of electrons available for tube current.
D) distance the electrons travel from cathode to anode.
Q3) If the first radiograph of a chest is done using 72 in and 12 mAs,and a second radiograph is done using 40 in,how much mAs should be used to maintain exposure to the IR?
A) 2 mAs
B) 4 mAs
C) 7 mAs
D) 9 mAs
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Chapter 7: Scatter Control
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Q1) When using a digital flat-panel detector:
A) the x-ray beam will automatically collimate to the appropriate size for the part.
B) the entire detector should be exposed.
C) the radiographer must adjust the collimator to the area of interest.
D) A and C.
Q2) Which of the following statements is true?
A) If the height of the lead strips increases and the space between the grid strips decreases, the grid will be more effective at scatter removal.
B) If the height of the lead strip decreases and the space between the grid strips increases, the grid will be more effective at removing scatter radiation.
C) A high ratio grid removes little scatter.
D) A grid decreases scatter production.
Q3) When a grid is needed but not available,the _____ may be used for certain examinations.
A) tomographic technique
B) air-gap technique
C) Seldinger technique
D) reverse collimation technique
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Chapter 8: Exposure Technique Selection
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Q1) If a part measures 14 cm and requires the use of 75 kVp,how much kVp would a part measuring 18 cm require when using a variable kVp-fixed mAs technique chart?
A) 67 kVp
B) 77 kVp
C) 83 kVp
D) 91 kVp
Q2) When using film-screen,what happens when an outside detector is selected for an AP thoracic spine?
A) The spine will have insufficient contrast.
B) The spine will be too dark.
C) The spine will have excessive contrast.
D) The spine will have insufficient density.
Q3) When using AEC,what should the radiographer adjust to manipulate the contrast of the image?
A) kVp
B) Detector selection
C) Exposure time
D) Focal spot size
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Chapter 9: Image Evaluation
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Q1) An area of decreased brightness visualized on a computer monitor has ________density on a film image.
A) increased
B) decreased
C) no
Q2) A film-screen image produced using 16 mAs at 80 kVp has to be repeated because it is too dark.Which of the following exposure factors would be the best choice to correct the problem?
A) 4 mAs at 80 kVp
B) 8 mAs at 80 kVp
C) 8 mAs at 68 kVp
D) 16 mAs at 68 kVp
Q3) A film-screen image with lower contrast may be due to:
1)Increased patient thickness
2)Increased beam restriction
3)Increased kVp
A) 1 and 2 only.
B) 1 and 3 only.
C) 2 and 3 only.
D) 1, 2, and 3.
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Chapter 10: Dynamic Imaging: Fluoroscopy
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Q1) Releasing the pressure applied to the ________________ will terminate the radiation exposure during fluoroscopy.
A) photocathode
B) input phosphor
C) deadman switch
D) radiographic mode
Q2) The conventional or current method for viewing the fluoroscopic image is by:
A) using a hand-held device.
B) looking directly at the output phosphor.
C) using a TV monitor.
D) using a mirror-optics system.
Q3) The TFTs control the current to each pixel and switch it on or off by causing the liquid crystals to twist or untwist in which type of monitor?
A) CRT monitor
B) LCD monitor
C) Plasma monitor
D) Smartphone monitor
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