Fluoroscopy: Radiation Protection and Safety Questions
With Complete Solutions
.What is most commonly used shielding material? Correct
Answers Lead
1 Ci is equal to how bank Bequerels? Correct Answers 3.7 x10
(10) bequerels
1 Gray equals how many RAD? Correct Answers 100 rad
1 Gy = x rads Correct Answers 100 rads
1 Rad = x ergs/gm Correct Answers 100 ergs/gram
1 Rad equals how many Grays? Correct Answers 0.01 Grays
1 rem equals how many sieverts? Correct Answers 0.01 Sv
1 Sv = x mSV Correct Answers 1000 mSv
1 Sv = x Rems Correct Answers 100 Rems
1 Sv = xrem Correct Answers 100
1 Sv = xREM Correct Answers 100 rem
4 OSL components? Correct Answers OSL sensitivity ranges
X ray and gamma = 1 mrem - 1000 remBeta = 10 mrem - 1000
remNeuron = 20 mrem - 25 rem
OSL Components
,- sensing material holder- water resistant blister pack- preloaded
detector packet containing several different filters
50 mA/image x 3 images/patient x 80 patient/day x 7 days/week
is how many mA-min per week? Correct Answers 50x3x80x7 =
84,000 divided by 60 seconds = 1400 mA-min/week
A 0.2mm copper filter reduces dose by what percentage?
Correct Answers 50%
A 1 Gray dose is to how many Joules of radiation? Correct
Answers 1 Joule/kg
A 2.0 mm copper filter reduce dose by what percentage? Correct
Answers 70%
A 30 days follow up visit should be scheduled for a patient who
receives a skin dose of what Gy? Correct Answers 2 Gy
A digitized video signal allows what 4 imaging processing
techniques? Correct Answers Last image hold
gray scale processing
temporal frame averaging
and edge enhancement
A female gonad shield is what lead equivalent thickness in mm?
Correct Answers 1 mm
A fetus is how many more times sensitive to radiation damage
than an adult? Correct Answers 2x
,A flat piece of lead with an opening in the middle Correct
Answers aperture diaphragm
A fluoro technique to obtain a permanent image a live fluoro
sequence. Correct Answers Frame grabbing
A grid controlled pulsing feature is used for what two types of
fluoro? Correct Answers pulsed or cine image recording
A KUB exam delivers what fetal dose in mGy or mrad? Correct
Answers 2mGy or 200 mrad
A larger or smaller field of view increases scatter radiation?
Correct Answers larger
A loss of image brightness or intensity around the periphery of
the image Correct Answers vignetting
A magnification mode increases voltage two what device in the
imaging chain? Correct Answers focusing lenses
A phosphor is used in what type of conversion, direct or
indirect? Correct Answers indirect
A radiograph of a particular anatomic area this is captured by
using rapid fluoroscopic exposure and limiting the radiation
passing through the anatomical area. Correct Answers Spot film
A round set of shutter blades to match the xray beam to the
circular shape of the image intensifier Correct Answers iris
collimation
, A TOP is not considered for a dose less than how many mGy or
rad? Correct Answers 1000mGy or 10 rad
Ability of an imaging system to visualize two adjacent structures
Correct Answers Spatial resolution
After striking what two layers in the input layer are X-rays
converted into light photons Correct Answers When x-rays pass
through the 0.5mm aluminium substrate layer and cesium iodide
input phosphor layer?
ALARA assumes a linear or nonlinear and threshold or
nonthreshold dose response relationship? Correct Answers
linear nonthreshold
All processes contribute to veiling glare except what? Correct
Answers Xray scatter
All the main components of the image intensifier are contained
in what device? Correct Answers vacuum bottle
Although collimation decrases overall radiation to the patient,
what exposure metric increases? Correct Answers ESE
An audible signal is produced when fluoro time exceeds how
many minutes per case? Correct Answers 5 minutes
An exposure of 10mGy can result in what Loss of Life
expenctancy in days? Correct Answers 1.5 days
With Complete Solutions
.What is most commonly used shielding material? Correct
Answers Lead
1 Ci is equal to how bank Bequerels? Correct Answers 3.7 x10
(10) bequerels
1 Gray equals how many RAD? Correct Answers 100 rad
1 Gy = x rads Correct Answers 100 rads
1 Rad = x ergs/gm Correct Answers 100 ergs/gram
1 Rad equals how many Grays? Correct Answers 0.01 Grays
1 rem equals how many sieverts? Correct Answers 0.01 Sv
1 Sv = x mSV Correct Answers 1000 mSv
1 Sv = x Rems Correct Answers 100 Rems
1 Sv = xrem Correct Answers 100
1 Sv = xREM Correct Answers 100 rem
4 OSL components? Correct Answers OSL sensitivity ranges
X ray and gamma = 1 mrem - 1000 remBeta = 10 mrem - 1000
remNeuron = 20 mrem - 25 rem
OSL Components
,- sensing material holder- water resistant blister pack- preloaded
detector packet containing several different filters
50 mA/image x 3 images/patient x 80 patient/day x 7 days/week
is how many mA-min per week? Correct Answers 50x3x80x7 =
84,000 divided by 60 seconds = 1400 mA-min/week
A 0.2mm copper filter reduces dose by what percentage?
Correct Answers 50%
A 1 Gray dose is to how many Joules of radiation? Correct
Answers 1 Joule/kg
A 2.0 mm copper filter reduce dose by what percentage? Correct
Answers 70%
A 30 days follow up visit should be scheduled for a patient who
receives a skin dose of what Gy? Correct Answers 2 Gy
A digitized video signal allows what 4 imaging processing
techniques? Correct Answers Last image hold
gray scale processing
temporal frame averaging
and edge enhancement
A female gonad shield is what lead equivalent thickness in mm?
Correct Answers 1 mm
A fetus is how many more times sensitive to radiation damage
than an adult? Correct Answers 2x
,A flat piece of lead with an opening in the middle Correct
Answers aperture diaphragm
A fluoro technique to obtain a permanent image a live fluoro
sequence. Correct Answers Frame grabbing
A grid controlled pulsing feature is used for what two types of
fluoro? Correct Answers pulsed or cine image recording
A KUB exam delivers what fetal dose in mGy or mrad? Correct
Answers 2mGy or 200 mrad
A larger or smaller field of view increases scatter radiation?
Correct Answers larger
A loss of image brightness or intensity around the periphery of
the image Correct Answers vignetting
A magnification mode increases voltage two what device in the
imaging chain? Correct Answers focusing lenses
A phosphor is used in what type of conversion, direct or
indirect? Correct Answers indirect
A radiograph of a particular anatomic area this is captured by
using rapid fluoroscopic exposure and limiting the radiation
passing through the anatomical area. Correct Answers Spot film
A round set of shutter blades to match the xray beam to the
circular shape of the image intensifier Correct Answers iris
collimation
, A TOP is not considered for a dose less than how many mGy or
rad? Correct Answers 1000mGy or 10 rad
Ability of an imaging system to visualize two adjacent structures
Correct Answers Spatial resolution
After striking what two layers in the input layer are X-rays
converted into light photons Correct Answers When x-rays pass
through the 0.5mm aluminium substrate layer and cesium iodide
input phosphor layer?
ALARA assumes a linear or nonlinear and threshold or
nonthreshold dose response relationship? Correct Answers
linear nonthreshold
All processes contribute to veiling glare except what? Correct
Answers Xray scatter
All the main components of the image intensifier are contained
in what device? Correct Answers vacuum bottle
Although collimation decrases overall radiation to the patient,
what exposure metric increases? Correct Answers ESE
An audible signal is produced when fluoro time exceeds how
many minutes per case? Correct Answers 5 minutes
An exposure of 10mGy can result in what Loss of Life
expenctancy in days? Correct Answers 1.5 days
