Bontrager Chapter 15 Workbook Exam
with correct Answers
List the 2 primary types of mobile x-ray units - Correct Answers -1. Battery-powered,
Battery-driven type
2. Standard AC power source, non-motor drive
True/False: A fully charged battery-powered mobile unit has driving range of up to 10
miles on level ground - Correct Answers -True
With battery-powered types, how long does recharging take if the batteries are fully
discharged? - Correct Answers -8 hours
Which type of mobile unit is lighter in weight? - Correct Answers -Standard power
source, non-motor drive
Which of the following techniques best reduces the dose to the surgical team during a
C-arm procedure?
A. Use boost function whenever possible
B. Place tube in vertical position above patient
C. Use intermittent fluoroscopy
D. Lower kV as low as possible - Correct Answers -C. Use intermittent fluoroscopy
What is the primary benefit of the "pulse mode" on a digital C-arm unit? - Correct
Answers -Reducing patient dose
Situation: An image taken during an operative cholangiogram shows that the biliary
ducts are superimposed over the spine. The surgeon wants the ducts projected away
from the spine. Which of the following positions may eliminate this problem during the
repeat exposure?
A. Shallow RPO
B. Shallow LPO
C. AP
D. Horizontal beam lateral - Correct Answers -A. Shallow RPO
True/False: Laparascopic cholecystectomy is not suited for every patient and condition.
- Correct Answers -True
What is the common term for a mobile fluoroscopy unit? - Correct Answers -C-arm
,What are the two primary components of a mobile fluoroscopy unit (located on each end
of the structure from which it derives its name)? - Correct Answers -A. X-ray tube
B. Image Intensifier
Why should the mobile fluoroscopy unit not be placed in the AP projection ("tube on top"
position)? - Correct Answers -It results in a significant increase in exposure to the head,
eyes, & neck region of the operator
With the tube & intensifier in a horizontal position, at which side of the patient should the
surgeon stand if he or she must remain near the patient - the x-ray tube side or the
intensifier side?
Why? - Correct Answers -Intensifier side; the radiation field pattern extends out farther
on the x-ray tube side
Of the two monitors found on most mobile fluoroscopy units, which is generally
considered the "active" monitor - the right or the left? - Correct Answers -Left monitor
True/False: The operator must determine image orientation on the mobile fluoroscopy
monitors before the patient is brought into the room - Correct Answers -True
True/False: All mobile digital fluoroscopy units include the ability to magnify the image
on the monitor during fluoroscopy - Correct Answers -True
A 30-degree C-arm tilt from the vertical perspective increases exposure to the head &
neck regions of the operator by a factor of_______ - Correct Answers -4
True/False: AEC exposure systems are not feasible with mobile fluoroscopy - Correct
Answers -False (can be used)
Name the feature that allows an image to be held on the monitor while also providing
continuous fluoroscopy imaging - Correct Answers -Roadmapping
Situation: The C-arm is in position for a PA projection. What exposure field range would
the operator receive at waist level standing 3 feet from the patient?
A. 20 to 25 mR/hour
B. 25 to 50 mR/hour
C. 50 to 100 mR/hour
D. 100 to 300 mR/hour - Correct Answers -C. 50 to 100 mR/hour
Approximately how much exposure at waist level would the operator receive with 5
minutes of fluoroscopy exposure standing 3 feet from the patient? (Hint: First convert
mR/hour to mR/minute by dividing by 60; then multiply by minutes of fluoroscopy time.)
A. 5 mR
B. 60 mR
C. 25 mR
, D. 2 mR - Correct Answers -A. 5 mR (60 mR/60 min = 1 mR x 5 min = 5)
If a technologist receives 50 mR/hour standing 3 feet from the mobile fluoroscopy unit,
what would be the exposure rate be if he or she moved back to a distance of 4 feet?
A. 10 mR/hour
B. 25 mR/hour
C. 100 mR/hour
D. No significant difference - Correct Answers -B. 25 mR/hour
A technologist standing 1 foot from a mobile fluoroscopy unit is receiving approximately
400 mR/hour. What is the total exposure to the technologist if the procedure takes 10
minutes of fluoroscopy time to complete? - Correct Answers -67 mR (400/60 x 10=67)
Situation: An operator receives 25 mR/hour to the facial & neck region with the C-arm in
position for a PA projection (intensifier on top). Approximately how much would the
operator receive at the same distance if the C-arm were reversed to an AP projection
position (tube on top)?
A. 25 to 50 mR/hour
B. 50 to 100 mR/hour
C. 100 to 300 mR/hour
D. 300 to 500 mR/hour - Correct Answers -C. 100 to 300 mR/hour
True/False: The intermittent mode used during mobile fluoroscopy procedures is helpful
during procedures to produce brighter images, but it results in significantly increased
patient exposure. - Correct Answers -False (reduces exposure to patient
Which single term best describes the primary difference between trauma positions &
standard positioning? - Correct Answers -Adaptation
What should be done to achieve specific projections if the patient cannot move because
of trauma? - Correct Answers -Move the CR & IR around the patient to produce similar
projections rather than moving the patient.
What is the minimum number of projections generally required for any trauma study? -
Correct Answers -2 projections taken 90-degrees to each other
How many joints must be included for an initial study of a long bone? - Correct Answers
-2; both joints must be included on the initial study
True/False: A follow-up postreduction radiograph of the middle portion of long bones
should be collimated closely to the fracture region. - Correct Answers -False (must
include at least one joint nearest injury)
True/False: Digital radiography is well suited for ED & mobile procedures. - Correct
Answers -True
with correct Answers
List the 2 primary types of mobile x-ray units - Correct Answers -1. Battery-powered,
Battery-driven type
2. Standard AC power source, non-motor drive
True/False: A fully charged battery-powered mobile unit has driving range of up to 10
miles on level ground - Correct Answers -True
With battery-powered types, how long does recharging take if the batteries are fully
discharged? - Correct Answers -8 hours
Which type of mobile unit is lighter in weight? - Correct Answers -Standard power
source, non-motor drive
Which of the following techniques best reduces the dose to the surgical team during a
C-arm procedure?
A. Use boost function whenever possible
B. Place tube in vertical position above patient
C. Use intermittent fluoroscopy
D. Lower kV as low as possible - Correct Answers -C. Use intermittent fluoroscopy
What is the primary benefit of the "pulse mode" on a digital C-arm unit? - Correct
Answers -Reducing patient dose
Situation: An image taken during an operative cholangiogram shows that the biliary
ducts are superimposed over the spine. The surgeon wants the ducts projected away
from the spine. Which of the following positions may eliminate this problem during the
repeat exposure?
A. Shallow RPO
B. Shallow LPO
C. AP
D. Horizontal beam lateral - Correct Answers -A. Shallow RPO
True/False: Laparascopic cholecystectomy is not suited for every patient and condition.
- Correct Answers -True
What is the common term for a mobile fluoroscopy unit? - Correct Answers -C-arm
,What are the two primary components of a mobile fluoroscopy unit (located on each end
of the structure from which it derives its name)? - Correct Answers -A. X-ray tube
B. Image Intensifier
Why should the mobile fluoroscopy unit not be placed in the AP projection ("tube on top"
position)? - Correct Answers -It results in a significant increase in exposure to the head,
eyes, & neck region of the operator
With the tube & intensifier in a horizontal position, at which side of the patient should the
surgeon stand if he or she must remain near the patient - the x-ray tube side or the
intensifier side?
Why? - Correct Answers -Intensifier side; the radiation field pattern extends out farther
on the x-ray tube side
Of the two monitors found on most mobile fluoroscopy units, which is generally
considered the "active" monitor - the right or the left? - Correct Answers -Left monitor
True/False: The operator must determine image orientation on the mobile fluoroscopy
monitors before the patient is brought into the room - Correct Answers -True
True/False: All mobile digital fluoroscopy units include the ability to magnify the image
on the monitor during fluoroscopy - Correct Answers -True
A 30-degree C-arm tilt from the vertical perspective increases exposure to the head &
neck regions of the operator by a factor of_______ - Correct Answers -4
True/False: AEC exposure systems are not feasible with mobile fluoroscopy - Correct
Answers -False (can be used)
Name the feature that allows an image to be held on the monitor while also providing
continuous fluoroscopy imaging - Correct Answers -Roadmapping
Situation: The C-arm is in position for a PA projection. What exposure field range would
the operator receive at waist level standing 3 feet from the patient?
A. 20 to 25 mR/hour
B. 25 to 50 mR/hour
C. 50 to 100 mR/hour
D. 100 to 300 mR/hour - Correct Answers -C. 50 to 100 mR/hour
Approximately how much exposure at waist level would the operator receive with 5
minutes of fluoroscopy exposure standing 3 feet from the patient? (Hint: First convert
mR/hour to mR/minute by dividing by 60; then multiply by minutes of fluoroscopy time.)
A. 5 mR
B. 60 mR
C. 25 mR
, D. 2 mR - Correct Answers -A. 5 mR (60 mR/60 min = 1 mR x 5 min = 5)
If a technologist receives 50 mR/hour standing 3 feet from the mobile fluoroscopy unit,
what would be the exposure rate be if he or she moved back to a distance of 4 feet?
A. 10 mR/hour
B. 25 mR/hour
C. 100 mR/hour
D. No significant difference - Correct Answers -B. 25 mR/hour
A technologist standing 1 foot from a mobile fluoroscopy unit is receiving approximately
400 mR/hour. What is the total exposure to the technologist if the procedure takes 10
minutes of fluoroscopy time to complete? - Correct Answers -67 mR (400/60 x 10=67)
Situation: An operator receives 25 mR/hour to the facial & neck region with the C-arm in
position for a PA projection (intensifier on top). Approximately how much would the
operator receive at the same distance if the C-arm were reversed to an AP projection
position (tube on top)?
A. 25 to 50 mR/hour
B. 50 to 100 mR/hour
C. 100 to 300 mR/hour
D. 300 to 500 mR/hour - Correct Answers -C. 100 to 300 mR/hour
True/False: The intermittent mode used during mobile fluoroscopy procedures is helpful
during procedures to produce brighter images, but it results in significantly increased
patient exposure. - Correct Answers -False (reduces exposure to patient
Which single term best describes the primary difference between trauma positions &
standard positioning? - Correct Answers -Adaptation
What should be done to achieve specific projections if the patient cannot move because
of trauma? - Correct Answers -Move the CR & IR around the patient to produce similar
projections rather than moving the patient.
What is the minimum number of projections generally required for any trauma study? -
Correct Answers -2 projections taken 90-degrees to each other
How many joints must be included for an initial study of a long bone? - Correct Answers
-2; both joints must be included on the initial study
True/False: A follow-up postreduction radiograph of the middle portion of long bones
should be collimated closely to the fracture region. - Correct Answers -False (must
include at least one joint nearest injury)
True/False: Digital radiography is well suited for ED & mobile procedures. - Correct
Answers -True
