CA fluoro Test 2 Questions With Complete Solutions
A diagnostic fluoro exam usually uses around what dose rate?
Correct Answers 1-5 rads/ min
A primary protective barrier is- Correct Answers The image
intensifier assembly.
Ceiling, walls and floor are only exposed to secondary or
scattered radiation and are considered secondary barriers.
An estimated 95% dose reduction can be achieved when using
this during fluoroscopy. Correct Answers Video disc recording
Components of a closed-circuit television system Correct
Answers Vidicon camera
Camera control unit
Monitor
Compton scattering Correct Answers Interaction of an X-Ray
with an outer orbital electron of the absorber atom producing a
recoil electron and a photon energy which is less than that of the
incident photon.
Conversion Factor Correct Answers Formula-
Intensity of output phosphor/ millirad per sec
Explanation-
Ratio of the output phosphor intensity to the input exposure rate.
Definition of air kerma Correct Answers The amount of energy
transferred from X-Ray to charged particles per unit mass of air.
, Electron intensification Correct Answers A process in the
image intensifier where electrons are accelerated from the
photocathode to the output phosphor.
Electrons are focused by the... Correct Answers Electrostatic
lens
Flat panel detector elements Correct Answers Scintillation layer
made of cesium iodide, which attenuates X-Rays and produces
light.
Light is then directed to a photodiode below which converts
signal to electricity which is then used to generate an electronic
image.
Grids can increase dose by how much? Correct Answers 1.5-2
times
Growing tissue that is exposed to radiation most frequently
develops- Correct Answers Stoppage of cell division
High radiation area Correct Answers Area where individual
could receive a dose equivalent greater than 1 mSv in one hour
Hourly radiation dose limit for members of the public. Correct
Answers 0.002 rem per hour
0.1 rem per year/ 1 mSv per year
How is resolving power measured? Correct Answers Line pairs
per millimeter.
A diagnostic fluoro exam usually uses around what dose rate?
Correct Answers 1-5 rads/ min
A primary protective barrier is- Correct Answers The image
intensifier assembly.
Ceiling, walls and floor are only exposed to secondary or
scattered radiation and are considered secondary barriers.
An estimated 95% dose reduction can be achieved when using
this during fluoroscopy. Correct Answers Video disc recording
Components of a closed-circuit television system Correct
Answers Vidicon camera
Camera control unit
Monitor
Compton scattering Correct Answers Interaction of an X-Ray
with an outer orbital electron of the absorber atom producing a
recoil electron and a photon energy which is less than that of the
incident photon.
Conversion Factor Correct Answers Formula-
Intensity of output phosphor/ millirad per sec
Explanation-
Ratio of the output phosphor intensity to the input exposure rate.
Definition of air kerma Correct Answers The amount of energy
transferred from X-Ray to charged particles per unit mass of air.
, Electron intensification Correct Answers A process in the
image intensifier where electrons are accelerated from the
photocathode to the output phosphor.
Electrons are focused by the... Correct Answers Electrostatic
lens
Flat panel detector elements Correct Answers Scintillation layer
made of cesium iodide, which attenuates X-Rays and produces
light.
Light is then directed to a photodiode below which converts
signal to electricity which is then used to generate an electronic
image.
Grids can increase dose by how much? Correct Answers 1.5-2
times
Growing tissue that is exposed to radiation most frequently
develops- Correct Answers Stoppage of cell division
High radiation area Correct Answers Area where individual
could receive a dose equivalent greater than 1 mSv in one hour
Hourly radiation dose limit for members of the public. Correct
Answers 0.002 rem per hour
0.1 rem per year/ 1 mSv per year
How is resolving power measured? Correct Answers Line pairs
per millimeter.
