RTBC - fundamentals of fluoroscopy Questions With
Complete Solutions
According to the inverse square law, how does increasing
distance from the radiation source affect radiation intensity?
Correct Answers Intensity decreases by the square of the
distance from the source
Beam restriction is a method used to manage patient dose in
fluoroscopy. Use the following illustration to determine the type
of beam restriction and the resulting patient dose. Correct
Answers Scenario A demonstrates increased beam restriction
Scenario A will decrease the patient dose
During a fluoroscopic procedure, the tech observes that the
fluoroscopy time is reaching the five minute mark. What steps
should be taken? Correct Answers Notify the operator that the 5
minute point is approaching
During a mobile fluoroscopy study in the operating room, the
surgeon asks the tech to reduce the magnification of the part and
include more anatomy within the field of view. How should the
tech adjust the C-arm? Correct Answers Position the IR closer
to the patient
During which fluoroscopy procedure might the lead curtain need
to be removed for infection control purposes? Correct Answers
Myelogram
, How are source-to-skin distance (SSD) and patient dose related
in fluoroscopy? Correct Answers Reduced SSD results in
increased patient dose
How does the 15% rule relate to barium contrast in fluoroscopy?
Correct Answers An increase in kVp by 15% doubles the
exposure, so mAs should be halved.
How is the distance between the x-ray source and the image
receptor (IR) different in mobile fluoroscopy and stationary
fluoroscopy? Correct Answers In mobile fluoroscopy, the x-ray
source and the IR usually remain equidistant due to the C-arm.
In order to reduce exposure and avoid scattered beams, clinical
staff should: Correct Answers Increase the distance from the
patient
In order to reduce scatter radiation, where should the x-ray
source be placed when the operator needs to be close to the
patient during mobile fluoroscopy? Correct Answers
Underneath the patient
In what scenario would intermittent fluoroscopy be beneficial?
Correct Answers During a cystogram to periodically check
bladder fill progress
Iso-exposure curves in a fluoroscopic system represent the:
Correct Answers Different levels of radiation intensity around a
fluoroscopic system
Complete Solutions
According to the inverse square law, how does increasing
distance from the radiation source affect radiation intensity?
Correct Answers Intensity decreases by the square of the
distance from the source
Beam restriction is a method used to manage patient dose in
fluoroscopy. Use the following illustration to determine the type
of beam restriction and the resulting patient dose. Correct
Answers Scenario A demonstrates increased beam restriction
Scenario A will decrease the patient dose
During a fluoroscopic procedure, the tech observes that the
fluoroscopy time is reaching the five minute mark. What steps
should be taken? Correct Answers Notify the operator that the 5
minute point is approaching
During a mobile fluoroscopy study in the operating room, the
surgeon asks the tech to reduce the magnification of the part and
include more anatomy within the field of view. How should the
tech adjust the C-arm? Correct Answers Position the IR closer
to the patient
During which fluoroscopy procedure might the lead curtain need
to be removed for infection control purposes? Correct Answers
Myelogram
, How are source-to-skin distance (SSD) and patient dose related
in fluoroscopy? Correct Answers Reduced SSD results in
increased patient dose
How does the 15% rule relate to barium contrast in fluoroscopy?
Correct Answers An increase in kVp by 15% doubles the
exposure, so mAs should be halved.
How is the distance between the x-ray source and the image
receptor (IR) different in mobile fluoroscopy and stationary
fluoroscopy? Correct Answers In mobile fluoroscopy, the x-ray
source and the IR usually remain equidistant due to the C-arm.
In order to reduce exposure and avoid scattered beams, clinical
staff should: Correct Answers Increase the distance from the
patient
In order to reduce scatter radiation, where should the x-ray
source be placed when the operator needs to be close to the
patient during mobile fluoroscopy? Correct Answers
Underneath the patient
In what scenario would intermittent fluoroscopy be beneficial?
Correct Answers During a cystogram to periodically check
bladder fill progress
Iso-exposure curves in a fluoroscopic system represent the:
Correct Answers Different levels of radiation intensity around a
fluoroscopic system
