FLUOROSCOPY ACTUAL TEST PAPER
QUESTIONS WITH SOLUTIONS GRADED
A
◉ If X-ray source is below the table, useful beam exposure must be
measured at what distance above the table top. Answer: 30 cm
◉ Table top exposure rates for units without auto exposure control
must be measured every. Answer: 3 years
◉ Dark adaptation for the eye takes how long. Answer: 30 minutes
◉ Target-to-tabletop distance must be greater than and should be
greater than.... Answer: 12 and 18 inches
◉ Integration time for brain to recognize an object. Answer: 0.2
seconds
◉ Most scatter occurs at which direction from the primary beam.
Answer: 135 degrees
◉ mA setting for spot filming where a spot film camera is not used.
Answer: 150 mA
,◉ Greatest dose to the patient comes from spot filming cameras
using this film size. Answer: 105 mm
◉ SI unit analogous to the rad is. Answer: Gray
◉ _________ is a variation in density resulting from the random spatial
distribution of quanta.. Answer: Quantum sink
◉ SI unit analogous to the rem. Answer: Sievert (unit)
◉ Exposure reduction of .25 mm lead. Answer: 97%
◉ Scattered radiation received is proportional to. Answer: Dose
received by the patient
◉ Most effective medium for static viewing in terms of reducing
patient dose. Answer: Video disc recorder
◉ Contrast of the image intensifying tube is measured by. Answer:
conversion factor
◉ maximum magnification for cinefluorography is done via which
method. Answer: total over framing
, ◉ Ratio of photons that leave the output phosphor to the number of
Xray photons that strike the input phosphor. Answer: Flux gain
◉ Half value layer determines which characteristic of the Xray.
Answer: Xray quality
◉ Ability to distinguish separate objects in line pairs per mm.
Answer: Resolving power
◉ The portion of the image intensifier responsible for magnification.
Answer: electrostatic lenses
◉ resolution of a 9 inch image intensifier tube. Answer: 3.5 line
pairs per millimeter
◉ light photons intercepting when electrons strike a fluorescent
screen forms a.... Answer: Real image
◉ Fluoro with a grid in place affects exposure rates how. Answer:
1.5-2 x higher
◉ Greatest radiosensitivity of fetus occurs when. Answer: 2-8 weeks
gestation
QUESTIONS WITH SOLUTIONS GRADED
A
◉ If X-ray source is below the table, useful beam exposure must be
measured at what distance above the table top. Answer: 30 cm
◉ Table top exposure rates for units without auto exposure control
must be measured every. Answer: 3 years
◉ Dark adaptation for the eye takes how long. Answer: 30 minutes
◉ Target-to-tabletop distance must be greater than and should be
greater than.... Answer: 12 and 18 inches
◉ Integration time for brain to recognize an object. Answer: 0.2
seconds
◉ Most scatter occurs at which direction from the primary beam.
Answer: 135 degrees
◉ mA setting for spot filming where a spot film camera is not used.
Answer: 150 mA
,◉ Greatest dose to the patient comes from spot filming cameras
using this film size. Answer: 105 mm
◉ SI unit analogous to the rad is. Answer: Gray
◉ _________ is a variation in density resulting from the random spatial
distribution of quanta.. Answer: Quantum sink
◉ SI unit analogous to the rem. Answer: Sievert (unit)
◉ Exposure reduction of .25 mm lead. Answer: 97%
◉ Scattered radiation received is proportional to. Answer: Dose
received by the patient
◉ Most effective medium for static viewing in terms of reducing
patient dose. Answer: Video disc recorder
◉ Contrast of the image intensifying tube is measured by. Answer:
conversion factor
◉ maximum magnification for cinefluorography is done via which
method. Answer: total over framing
, ◉ Ratio of photons that leave the output phosphor to the number of
Xray photons that strike the input phosphor. Answer: Flux gain
◉ Half value layer determines which characteristic of the Xray.
Answer: Xray quality
◉ Ability to distinguish separate objects in line pairs per mm.
Answer: Resolving power
◉ The portion of the image intensifier responsible for magnification.
Answer: electrostatic lenses
◉ resolution of a 9 inch image intensifier tube. Answer: 3.5 line
pairs per millimeter
◉ light photons intercepting when electrons strike a fluorescent
screen forms a.... Answer: Real image
◉ Fluoro with a grid in place affects exposure rates how. Answer:
1.5-2 x higher
◉ Greatest radiosensitivity of fetus occurs when. Answer: 2-8 weeks
gestation
