Total filtration permanently required in the useful fluoroscopic beam should not be less than Answer 2.5mm Aluminum
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 expos...
Fluoroscopy exam questions with correct
answers
Total filtration permanently required in the useful fluoroscopic beam should not be
less than Answer ✓✓ 2.5mm Aluminum
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
The quantity of the beam is controlled by which unit of measurement Answer ✓✓ miliamperage
Which fluoroscopic method gives patient dose reduction of up to to 95%? Answer✓✓ video disc recorder
100erg/gram is equivalent to? Answer ✓✓ 1 rad
Fluoro units with AECs or CINE cameras must have physicist calibration how often Answer✓✓ every year
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