ARRT SAFETY REVIEW ALL ANSWERS AND
QUESTIONS SET A+
✔✔What is fluoroscopy? - ✔✔Real time x ray imaging
✔✔Why can fluoroscopy result in relatively high patient dose? - ✔✔X rays may be
produced repeatedly or continuously over an extended time
✔✔What is one of the most effective ways to decrease fluoroscopic patient dose? -
✔✔Minimize fluoroscopy time
✔✔What is pulsed fluoroscopy? - ✔✔X rays are produced in short pulses rather than
continuously
✔✔How can pulsed fluoroscopy affect patient dose? - ✔✔It can reduce patient dose
when an appropriate pulse rate is used
✔✔What happens to dose when fluoroscopic pulse rate is reduced? - ✔✔Dose
generally decreases
✔✔What is last image hold? - ✔✔Display of the most recent fluoroscopic image without
additional radiation
✔✔How does last image hold reduce radiation exposure? - ✔✔It allows review without
producing additional x rays
✔✔What happens to patient dose when fluoroscopic magnification mode is used? -
✔✔Patient dose increases
✔✔Why does magnification mode increase fluoroscopic patient dose? - ✔✔The system
increases exposure to maintain image brightness or detector signal
,✔✔What is automatic brightness control? - ✔✔System that automatically adjusts
exposure factors to maintain fluoroscopic image brightness
✔✔What does ABC stand for? - ✔✔Automatic brightness control
✔✔What is automatic exposure rate control? - ✔✔System that adjusts exposure factors
to maintain adequate fluoroscopic image quality or detector signal
✔✔What does AERC stand for? - ✔✔Automatic exposure rate control
✔✔What can happen to patient dose when a thicker body part is placed in the
fluoroscopic beam? - ✔✔Dose rate generally increases because the system increases
exposure
✔✔What happens to patient dose when the image receptor is moved closer to the
patient during fluoroscopy? - ✔✔Patient dose decreases
✔✔Where should the fluoroscopic image receptor be positioned relative to the patient? -
✔✔As close to the patient as practical
✔✔What happens when the image receptor is moved farther away from the patient
during fluoroscopy? - ✔✔Patient dose generally increases
✔✔Where should the x ray tube be positioned relative to the patient when possible
during fluoroscopy? - ✔✔As far from the patient as practical within equipment limitations
✔✔What happens to entrance skin dose when the source to skin distance decreases? -
✔✔Entrance skin dose increases
✔✔What happens to entrance skin dose when source to skin distance increases? -
✔✔Entrance skin dose decreases
✔✔What does SSD stand for? - ✔✔Source to skin distance
✔✔What is the minimum source to skin distance for a stationary fluoroscope under
normal operation? - ✔✔15 inches or approximately 38 cm
✔✔What is the minimum source to skin distance for a mobile fluoroscope? - ✔✔12
inches or approximately 30 cm
✔✔What is the purpose of the fluoroscopic cumulative timer? - ✔✔Alert the operator to
accumulated fluoroscopy time
, ✔✔At what interval does the fluoroscopic cumulative timer traditionally provide an
audible signal? - ✔✔5 minutes
✔✔Does the 5 minute fluoroscopic timer automatically terminate the exposure? - ✔✔No
it provides an audible warning
✔✔What is high level control in fluoroscopy? - ✔✔Mode that permits a higher radiation
output when clinically necessary
✔✔What happens to patient and personnel dose when high level control is activated? -
✔✔Dose rate increases
✔✔Should high level control be used routinely? - ✔✔No
✔✔What is the purpose of the protective curtain or drape on a fluoroscopy unit? -
✔✔Reduce scatter radiation reaching personnel
✔✔What is the purpose of the Bucky slot cover on a fluoroscopy table? - ✔✔Reduce
scatter escaping through the Bucky opening
✔✔Where should the radiographer stand during fluoroscopy when possible? -
✔✔Behind the protective barrier or shield and away from the patient
✔✔What is the benefit of remote controlled fluoroscopy? - ✔✔Increases distance
between personnel and the radiation source and patient scatter
✔✔What is the purpose of air kerma display during fluoroscopy? - ✔✔Provide an
estimate of radiation energy delivered at a reference point and help monitor patient
dose
✔✔Why should fluoroscopic dose or time be documented? - ✔✔To track radiation
exposure especially during potentially high dose procedures
✔✔What is the primary source of occupational exposure during mobile radiography? -
✔✔Scatter from the patient
✔✔During a mobile radiographic exposure how far should the radiographer stand from
the patient when possible? - ✔✔At least 6 feet or about 2 meters
✔✔At what angle should a radiographer ideally stand relative to the scatter source
during mobile radiography? - ✔✔Approximately 90 to 135 degrees from the primary
beam direction when practical
QUESTIONS SET A+
✔✔What is fluoroscopy? - ✔✔Real time x ray imaging
✔✔Why can fluoroscopy result in relatively high patient dose? - ✔✔X rays may be
produced repeatedly or continuously over an extended time
✔✔What is one of the most effective ways to decrease fluoroscopic patient dose? -
✔✔Minimize fluoroscopy time
✔✔What is pulsed fluoroscopy? - ✔✔X rays are produced in short pulses rather than
continuously
✔✔How can pulsed fluoroscopy affect patient dose? - ✔✔It can reduce patient dose
when an appropriate pulse rate is used
✔✔What happens to dose when fluoroscopic pulse rate is reduced? - ✔✔Dose
generally decreases
✔✔What is last image hold? - ✔✔Display of the most recent fluoroscopic image without
additional radiation
✔✔How does last image hold reduce radiation exposure? - ✔✔It allows review without
producing additional x rays
✔✔What happens to patient dose when fluoroscopic magnification mode is used? -
✔✔Patient dose increases
✔✔Why does magnification mode increase fluoroscopic patient dose? - ✔✔The system
increases exposure to maintain image brightness or detector signal
,✔✔What is automatic brightness control? - ✔✔System that automatically adjusts
exposure factors to maintain fluoroscopic image brightness
✔✔What does ABC stand for? - ✔✔Automatic brightness control
✔✔What is automatic exposure rate control? - ✔✔System that adjusts exposure factors
to maintain adequate fluoroscopic image quality or detector signal
✔✔What does AERC stand for? - ✔✔Automatic exposure rate control
✔✔What can happen to patient dose when a thicker body part is placed in the
fluoroscopic beam? - ✔✔Dose rate generally increases because the system increases
exposure
✔✔What happens to patient dose when the image receptor is moved closer to the
patient during fluoroscopy? - ✔✔Patient dose decreases
✔✔Where should the fluoroscopic image receptor be positioned relative to the patient? -
✔✔As close to the patient as practical
✔✔What happens when the image receptor is moved farther away from the patient
during fluoroscopy? - ✔✔Patient dose generally increases
✔✔Where should the x ray tube be positioned relative to the patient when possible
during fluoroscopy? - ✔✔As far from the patient as practical within equipment limitations
✔✔What happens to entrance skin dose when the source to skin distance decreases? -
✔✔Entrance skin dose increases
✔✔What happens to entrance skin dose when source to skin distance increases? -
✔✔Entrance skin dose decreases
✔✔What does SSD stand for? - ✔✔Source to skin distance
✔✔What is the minimum source to skin distance for a stationary fluoroscope under
normal operation? - ✔✔15 inches or approximately 38 cm
✔✔What is the minimum source to skin distance for a mobile fluoroscope? - ✔✔12
inches or approximately 30 cm
✔✔What is the purpose of the fluoroscopic cumulative timer? - ✔✔Alert the operator to
accumulated fluoroscopy time
, ✔✔At what interval does the fluoroscopic cumulative timer traditionally provide an
audible signal? - ✔✔5 minutes
✔✔Does the 5 minute fluoroscopic timer automatically terminate the exposure? - ✔✔No
it provides an audible warning
✔✔What is high level control in fluoroscopy? - ✔✔Mode that permits a higher radiation
output when clinically necessary
✔✔What happens to patient and personnel dose when high level control is activated? -
✔✔Dose rate increases
✔✔Should high level control be used routinely? - ✔✔No
✔✔What is the purpose of the protective curtain or drape on a fluoroscopy unit? -
✔✔Reduce scatter radiation reaching personnel
✔✔What is the purpose of the Bucky slot cover on a fluoroscopy table? - ✔✔Reduce
scatter escaping through the Bucky opening
✔✔Where should the radiographer stand during fluoroscopy when possible? -
✔✔Behind the protective barrier or shield and away from the patient
✔✔What is the benefit of remote controlled fluoroscopy? - ✔✔Increases distance
between personnel and the radiation source and patient scatter
✔✔What is the purpose of air kerma display during fluoroscopy? - ✔✔Provide an
estimate of radiation energy delivered at a reference point and help monitor patient
dose
✔✔Why should fluoroscopic dose or time be documented? - ✔✔To track radiation
exposure especially during potentially high dose procedures
✔✔What is the primary source of occupational exposure during mobile radiography? -
✔✔Scatter from the patient
✔✔During a mobile radiographic exposure how far should the radiographer stand from
the patient when possible? - ✔✔At least 6 feet or about 2 meters
✔✔At what angle should a radiographer ideally stand relative to the scatter source
during mobile radiography? - ✔✔Approximately 90 to 135 degrees from the primary
beam direction when practical
