(Chp 11) 1. Which of the following is not an x-ray beam limitation device?
a. Cone
b. Collimator
c. Filter
d. Extension cylinder
C
(Chp 11) 2. The protective tube housing serves as a shield against ____ entering
the x-ray tube, thereby preventing electric shock while also facilitating cooling of
the x-ray tube.
a. the high voltage
b. the low voltage
c. lose inherent filter particles
d. collimator components
A
(Chp 11) 3. If the luminance of the collimator light source is adequate, the
localizing light beam will satisfactorily outline the margins of the radiographic
beam on the area of clinical interest on
a. infants only.
b. children only.
c. teenagers and adults only.
d. all patients.
D
(Chp 11) 4. When using digital fluoroscopy systems, making use of the last image
hold feature can
a. be an effective dose reduction technique.
b. eliminate the need to collimate the primary beam.
c. eliminate the need for body or part immobilization.
d. lead to a 50% reduction of technical exposure factors.
A
(Chp 11) 5. What is the purpose of radiographic beam filtration?
,a. To reduce exposure to the patient's skin and superficial tissues by absorbing
most of the higher-energy photons from the heterogeneous beam.
b. To reduce exposure to the patient's skin and superficial tissues by absorbing
most of the lower-energy photons from the heterogeneous beam.
c. To reduce exposure to the patient's skin and superficial tissues by absorbing
all of the higher-energy photons from the homogeneous beam.
d. To reduce exposure to the patient's skin and superficial tissues by removing all
the lower-energy photons from the homogeneous beam.
B
(Chp 11) 20. Fluoroscopic devices are capable of subjecting the patient, the
equipment operator, and other personnel near the fluoroscopic equipment to
substantial doses of ionizing radiation. These devices include
1. C-arm fluoroscopes.
2. fluoroscopes on stationary equipment with HLC mode used for interventional
procedures.
3. biplane interventional fluoroscopic systems.
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 4 only
d. 1, 2, 3, and 4
D
(Chp 11) 21. Of the following procedures, which involve extended fluoroscopic
time?
1. Biliary drainage
2. Stent and filter placement
3. Urinary or biliary stone removal
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
D
(Chp 11) 22. Luminance is determined by measuring the concentration of light
a. at only one particular point on the field of view.
b. over a particular field of view.
c. at only one particular point on the field of view and then squaring the number.
d. over a particular field of view and then squaring the number.
B
,(Chp 11) 23. When settings are changed from on mA to a neighboring mA station
and the mAs remains the same, the most that exposure linearity can vary is:
a. 2%
b. 5%
c. 10%
d. 15%
C
(Chp 11) 24. The control panel, where technical exposure factors are selected and
visually displayed for the equipment operator, must be located
a. at the foot end of the radiographic examining table.
b. at the head end of the radiographic examining table.
c. behind a suitable protective barrier that has a radiation-absorbent window that
permits observation of the patient during any procedure.
d. behind any regular wall that has a regular glass window that permits
observation of the patient during any procedure.
C
(Chp 11) 6. Depending on the area of the body being examined with a
fluoroscopic image intensification system, a range of ____ kVp is generally used
for adult patients.
a. 30 to 60
b. 60 to 75
c. 75 to 110
d. 110 to 140
C
(Chp 11) 7. When performing a mobile radiographic procedure, to reduce the
radiation exposure to the patient, the radiographer must use a minimal source-
skin distance of ____ (____).
a. 15 cm ; 6 inches
b. 30 cm; 12 inches
c. 38 cm; 15 inches
d. 45 cm; 18 inches
B
(Chp 11) 8. When a fluoroscopic image is electronically amplified by the use of an
image intensification system, which of the following benefits results?
1. Increased image brightness
, 2. Saving of time for the radiologist
3. Patient dose reduction
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
D
(Chp 11) 9. Current federal standards limit entrance skin exposure rates of
general-purpose intensified fluoroscopic units with maximum technique factors
engaged to a maximum of ____ mGya/min (____ R/min), as measured at tabletop,
with the image intensifier entrance surface at a prescribed 30 cm above the
tabletop.
a. 100; 10
b. 150; 15
c. 200; 20
d. 250; 25
A
(Chp 11) 10. During a fluoroscopic examination, a resettable cumulative timing
device measures the x-ray beam-on time and sounds an audible alarm or in some
cases temporarily interrupts the exposure after the fluoroscope has been
activated for what length of time?
a. 1 minute
b. 3 minutes
c. 5 minutes
d. 10 minutes
C
(Chp 11) 11. To visualize smaller and lower contrast objects during interventional
procedures, high level control fluoroscopy uses exposure rates that are ____
those normally used in routine fluoroscopy.
a. higher than
b. lower than
c. the same as
d. None of the above, because smaller and lower contrast objects cannot be
visualized by fluoroscopy during interventional procedures.
A
a. Cone
b. Collimator
c. Filter
d. Extension cylinder
C
(Chp 11) 2. The protective tube housing serves as a shield against ____ entering
the x-ray tube, thereby preventing electric shock while also facilitating cooling of
the x-ray tube.
a. the high voltage
b. the low voltage
c. lose inherent filter particles
d. collimator components
A
(Chp 11) 3. If the luminance of the collimator light source is adequate, the
localizing light beam will satisfactorily outline the margins of the radiographic
beam on the area of clinical interest on
a. infants only.
b. children only.
c. teenagers and adults only.
d. all patients.
D
(Chp 11) 4. When using digital fluoroscopy systems, making use of the last image
hold feature can
a. be an effective dose reduction technique.
b. eliminate the need to collimate the primary beam.
c. eliminate the need for body or part immobilization.
d. lead to a 50% reduction of technical exposure factors.
A
(Chp 11) 5. What is the purpose of radiographic beam filtration?
,a. To reduce exposure to the patient's skin and superficial tissues by absorbing
most of the higher-energy photons from the heterogeneous beam.
b. To reduce exposure to the patient's skin and superficial tissues by absorbing
most of the lower-energy photons from the heterogeneous beam.
c. To reduce exposure to the patient's skin and superficial tissues by absorbing
all of the higher-energy photons from the homogeneous beam.
d. To reduce exposure to the patient's skin and superficial tissues by removing all
the lower-energy photons from the homogeneous beam.
B
(Chp 11) 20. Fluoroscopic devices are capable of subjecting the patient, the
equipment operator, and other personnel near the fluoroscopic equipment to
substantial doses of ionizing radiation. These devices include
1. C-arm fluoroscopes.
2. fluoroscopes on stationary equipment with HLC mode used for interventional
procedures.
3. biplane interventional fluoroscopic systems.
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 4 only
d. 1, 2, 3, and 4
D
(Chp 11) 21. Of the following procedures, which involve extended fluoroscopic
time?
1. Biliary drainage
2. Stent and filter placement
3. Urinary or biliary stone removal
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
D
(Chp 11) 22. Luminance is determined by measuring the concentration of light
a. at only one particular point on the field of view.
b. over a particular field of view.
c. at only one particular point on the field of view and then squaring the number.
d. over a particular field of view and then squaring the number.
B
,(Chp 11) 23. When settings are changed from on mA to a neighboring mA station
and the mAs remains the same, the most that exposure linearity can vary is:
a. 2%
b. 5%
c. 10%
d. 15%
C
(Chp 11) 24. The control panel, where technical exposure factors are selected and
visually displayed for the equipment operator, must be located
a. at the foot end of the radiographic examining table.
b. at the head end of the radiographic examining table.
c. behind a suitable protective barrier that has a radiation-absorbent window that
permits observation of the patient during any procedure.
d. behind any regular wall that has a regular glass window that permits
observation of the patient during any procedure.
C
(Chp 11) 6. Depending on the area of the body being examined with a
fluoroscopic image intensification system, a range of ____ kVp is generally used
for adult patients.
a. 30 to 60
b. 60 to 75
c. 75 to 110
d. 110 to 140
C
(Chp 11) 7. When performing a mobile radiographic procedure, to reduce the
radiation exposure to the patient, the radiographer must use a minimal source-
skin distance of ____ (____).
a. 15 cm ; 6 inches
b. 30 cm; 12 inches
c. 38 cm; 15 inches
d. 45 cm; 18 inches
B
(Chp 11) 8. When a fluoroscopic image is electronically amplified by the use of an
image intensification system, which of the following benefits results?
1. Increased image brightness
, 2. Saving of time for the radiologist
3. Patient dose reduction
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3
D
(Chp 11) 9. Current federal standards limit entrance skin exposure rates of
general-purpose intensified fluoroscopic units with maximum technique factors
engaged to a maximum of ____ mGya/min (____ R/min), as measured at tabletop,
with the image intensifier entrance surface at a prescribed 30 cm above the
tabletop.
a. 100; 10
b. 150; 15
c. 200; 20
d. 250; 25
A
(Chp 11) 10. During a fluoroscopic examination, a resettable cumulative timing
device measures the x-ray beam-on time and sounds an audible alarm or in some
cases temporarily interrupts the exposure after the fluoroscope has been
activated for what length of time?
a. 1 minute
b. 3 minutes
c. 5 minutes
d. 10 minutes
C
(Chp 11) 11. To visualize smaller and lower contrast objects during interventional
procedures, high level control fluoroscopy uses exposure rates that are ____
those normally used in routine fluoroscopy.
a. higher than
b. lower than
c. the same as
d. None of the above, because smaller and lower contrast objects cannot be
visualized by fluoroscopy during interventional procedures.
A
