CA Fluoro tests Flash Cards Questions With Complete
Solutions
"radiation area" is an area in which there exists radiation levels
that could result in an individual receiving a dose equivalent in
excess of ___ in one hours at 30 cm form the radiation source.
a. 0.1 rem (1 mSv)
b. 1.0 rem (10 mSv)
c. 5 rems (50 mSv)
d. 0.005 rem (0.05 mSv Correct Answers 0.005 rem (0.05 mSv
A cell's operational "programing" is stored in what part of the
cell?
a. Cytoplasm
b. DNA
c. Genes
d. Chromosomes Correct Answers DNA
A Cesium Iodide / amorphous Silicon) flat panel detector used
for digital fluoroscopy is considered to be a:
1. indirect digital detector
2. direct digital detector
3. scintillator detector
4. non-scintillator detector Correct Answers 1 and 3
A charged coupled device (CCD) has a ___ sensitivity to light
and a ___ level of signal-to-noise ratio than an analog pick-up
tube.
a. higher, lower
b. lower, lower
c. lower, higher
,d. higher, higher Correct Answers higher, higher
A digital fluoroscopy with a charge coupled device has lower
____ and higher ____ than conventional fluoroscopy.
a. light sensitivity, patient dose
b. patient dose, light sensitivity
c. signal-to-noise ratio, patient dose
d. detective quantum efficiency, maintenance Correct Answers
patient dose, light sensitivity
A dose to the skin is most likely a good indicator of the:
a. Dose to the underlying bone marrow
b. Dose to the lens of the eyes
c. Dose to the underlying gonads
d. Level of dose received by organs near the point of interest
Correct Answers Level of dose received by organs near the
point of interest
A fluoroscopic system utilizing an indirect flat panel detector,
the ___ converts light into an electric signal.
a. Scintillator
b. Photodetector
c. Input phosphor
d. Output phosphor Correct Answers Photodetector
A generator operating in the "pulse-progressive fluoroscopy'
mode will produce usable x-ray photons during which period of
time?
a. duty cycle
b. extinction phase
c. interrogation phase Correct Answers duty cycle
,A image processing technique used to reduce radiation dose rate
is called?
a. Last image hold (LIH)
b. Temporal subtraction
c. Energy subtraction
d. Digital subtraction angiography (DSA) Correct Answers
Last image hold (LIH)
A matrix of digital values represented by pixels is transformed
into viewable brightness levels by a:
a. digital to analog converter
b. camera control unit
c. CRT monitor
d. analog-to-digital converter Correct Answers digital-to-
analog converter
A photospot camera utilizing either sheet or roll photospot film:
a. Uses a conventional x-ray processor to develop the image
b. Requires the x-ray beam splitting ability of an electron gun
c. Records the image generated from the TV monitor
d. Uses the same mechanical device to move the film from
frame to frame
. Correct Answers Uses a conventional x-ray processor to
develop the image
A protective apron with a thickness of 0.25 mm lead equivalent
is the minimum required.
a. True
b. False Correct Answers True
, All medical records should be stored for what length of time?
a. 23 years from the date of the last entry.
b. 7 years from the date of the last entry.
c. 3 years from the date of the last entry.
d. 10 years from the date of the last entry. Correct Answers 7
years from the date of the last entry.
An image intensifiers photocathode causes ___ to be given off in
direct proportion to the intensity of the fluorescent light:
a. remnant radiation
b. electrons
c. x-rays
d. light photons Correct Answers electrons
An indirect conversion flat panel detector consists of which of
the following layers?
a. Support layer, light transmission layer, phosphor layer
b. Scintillation layer, photodetective layer, TFT layer
c. Phosphor layer, silicone layer, selenium layer
d. Selenium, TFT layer, glass backing layer Correct Answers
Scintillation layer, photodetective layer, TFT layer
As shown in animal experiments, deleterious effects to the
embryo may be produced with doses of as little as ___ delivered
to the embryo.
a. 10 rads
b. 5 rads
c. 50 rads
d. 30 rads Correct Answers 10 rads
Solutions
"radiation area" is an area in which there exists radiation levels
that could result in an individual receiving a dose equivalent in
excess of ___ in one hours at 30 cm form the radiation source.
a. 0.1 rem (1 mSv)
b. 1.0 rem (10 mSv)
c. 5 rems (50 mSv)
d. 0.005 rem (0.05 mSv Correct Answers 0.005 rem (0.05 mSv
A cell's operational "programing" is stored in what part of the
cell?
a. Cytoplasm
b. DNA
c. Genes
d. Chromosomes Correct Answers DNA
A Cesium Iodide / amorphous Silicon) flat panel detector used
for digital fluoroscopy is considered to be a:
1. indirect digital detector
2. direct digital detector
3. scintillator detector
4. non-scintillator detector Correct Answers 1 and 3
A charged coupled device (CCD) has a ___ sensitivity to light
and a ___ level of signal-to-noise ratio than an analog pick-up
tube.
a. higher, lower
b. lower, lower
c. lower, higher
,d. higher, higher Correct Answers higher, higher
A digital fluoroscopy with a charge coupled device has lower
____ and higher ____ than conventional fluoroscopy.
a. light sensitivity, patient dose
b. patient dose, light sensitivity
c. signal-to-noise ratio, patient dose
d. detective quantum efficiency, maintenance Correct Answers
patient dose, light sensitivity
A dose to the skin is most likely a good indicator of the:
a. Dose to the underlying bone marrow
b. Dose to the lens of the eyes
c. Dose to the underlying gonads
d. Level of dose received by organs near the point of interest
Correct Answers Level of dose received by organs near the
point of interest
A fluoroscopic system utilizing an indirect flat panel detector,
the ___ converts light into an electric signal.
a. Scintillator
b. Photodetector
c. Input phosphor
d. Output phosphor Correct Answers Photodetector
A generator operating in the "pulse-progressive fluoroscopy'
mode will produce usable x-ray photons during which period of
time?
a. duty cycle
b. extinction phase
c. interrogation phase Correct Answers duty cycle
,A image processing technique used to reduce radiation dose rate
is called?
a. Last image hold (LIH)
b. Temporal subtraction
c. Energy subtraction
d. Digital subtraction angiography (DSA) Correct Answers
Last image hold (LIH)
A matrix of digital values represented by pixels is transformed
into viewable brightness levels by a:
a. digital to analog converter
b. camera control unit
c. CRT monitor
d. analog-to-digital converter Correct Answers digital-to-
analog converter
A photospot camera utilizing either sheet or roll photospot film:
a. Uses a conventional x-ray processor to develop the image
b. Requires the x-ray beam splitting ability of an electron gun
c. Records the image generated from the TV monitor
d. Uses the same mechanical device to move the film from
frame to frame
. Correct Answers Uses a conventional x-ray processor to
develop the image
A protective apron with a thickness of 0.25 mm lead equivalent
is the minimum required.
a. True
b. False Correct Answers True
, All medical records should be stored for what length of time?
a. 23 years from the date of the last entry.
b. 7 years from the date of the last entry.
c. 3 years from the date of the last entry.
d. 10 years from the date of the last entry. Correct Answers 7
years from the date of the last entry.
An image intensifiers photocathode causes ___ to be given off in
direct proportion to the intensity of the fluorescent light:
a. remnant radiation
b. electrons
c. x-rays
d. light photons Correct Answers electrons
An indirect conversion flat panel detector consists of which of
the following layers?
a. Support layer, light transmission layer, phosphor layer
b. Scintillation layer, photodetective layer, TFT layer
c. Phosphor layer, silicone layer, selenium layer
d. Selenium, TFT layer, glass backing layer Correct Answers
Scintillation layer, photodetective layer, TFT layer
As shown in animal experiments, deleterious effects to the
embryo may be produced with doses of as little as ___ delivered
to the embryo.
a. 10 rads
b. 5 rads
c. 50 rads
d. 30 rads Correct Answers 10 rads
