CALIFORNIA FLUOROSCOPY STATE BOARD EXAM
What digital fluoroscopic imaging technique utilizes changing masks, which provides
information of changes in contrast media content within a structure
1.Time interval difference imaging
2. Mask mode fluoroscopy
3. K -edge fluoroscopy
4. Synchronized fluoroscopy - Answers - 1. Time interval difference imaging
All of the following will directly influence the table-top exposure rate except
1. Light in the fluoroscopy room
2. kVp
3. Target to panel distance
4. Filtration - Answers - 1. Light in the fluoroscopy room
Attenuation of a radiation beam's intensity as it passes through an absorber is governed
by
1. Time
2. The specific mediums density
3. The energy of the radiation
4. The thickness of the absorber traversed - Answers - 2. The specific mediums density
3. The energy or radiation
4. The thickness of the absorber traversed
What recording medium will result in the least recorded resolution
1. Spot films using a spot film camera
2. video tape recording
3. spot films using conventional cassettes
4. video disc recording - Answers - 2. video tape recording
During the period when an individual receives an occupational dose, they are _
considered to be a "member of the public"
1. sometimes
2. always
3. it depends
4. never - Answers - 4.never
A person wearing a _ apron will reduce transmitted exposure to approximately 99.9% of
the incident scatter dose
1. 1.5 mm Pb equivalent
2. 0.50 mm Pb equivalent
3. 0.25 mm Pb equivalent
4. 1.0 mm Pb equivalent - Answers - 2. 0.50 mm Pb equivalent
,If the input phosphor of an image intensifier measures 15 inches in diameter and the
output phosphor measures 1.0 inches, the minification gain would be
1. 30
2. 225
3. 175
4. 300 - Answers - Minification Gain = {15(2) = 225} input screen diameter (2) / {1.0 (2)
= 1} output screen diameter (2) = 225/1= 225
What electronic system is designed to help maintain a consistent level of image
brightness
1. photo-emitter
2. automatic brightness stabilizer
3. camera control unit
4. vidicon - Answers - 2. automatic brightness stabilizer
Energy subtraction as used in digital fluoroscopy exhibits less _ than temporal
subtraction
1. complexity
2. x-ray intensity
3. kVp
4. motion artifact - Answers - 4. motion artifact
Bone marrow dose is measured
1. directly from bone marrow
2. as estimate from gonadal dose
3. as an estimate from ESE
4. directly from the beam - Answers - 3. as an estimate from the ESE
In a television system, the ratio between the vertical resolution and the number of
horizontal scan lines is called the
1. line rate factor
2. kell factor
3. conversion factor
4. resolution factor - Answers - 2. kell factor
In an image intensification tube, to prevent light from scattering back towards the photo
cathode layer, a thin sheet of aluminum is placed onto the :
1. output phosphor
2. accelerating anode
3. photo cathode
4. input phosphor - Answers - output phosphor
Digital photo spot image recording provides which of the following advantages
1. instant image playback
2. electronic image enlargement
3. improved resolution over conventional spot film
,c. 1,2 and 3
d. 1 only - Answers - c. 1,2 and 3
California state regulations state the target to panel or target to table
1. shall not be more than 18 inches
2. shall not be less than 12 inches
3. should not be less than 12 inches
4. should not be more than 18 inches - Answers - 2. shall not be less then 12 inches
which protective barrier is used to attenuate stray radiation
1. secondary protective barrier
2. x-ray tube housing
3. primary protective barrier
4. useful beam barrier - Answers - 3. primary protective barrier
During which period of time does a generator operating in the "pulse progressive
fluoroscopy" mode produce usable xray photons
1. duty cycle
2. extinction phase
3. interrogation phase - Answers - 1. duty cycle
The squared ratio of an input screen diameter to an output screen diameter is called:
1. minification ratio
2. conversion ratio
3. magnification ratio
4. flux gain - Answers - 1. minification ratio
The electron beam of the television camera tube is _ with the television viewing monitor
1. synchronized
2. interpolated
3. interlaced
4. modulated - Answers - 1. synchronized
It is known the intensity of radiation varies inversely to the square of the distance. As
one moves away from the source of scatter radiation, they will receive less radiation
dose because _
1. the air gap has a tendency to absorb some intensity
2. the scattered photons are much lower in energy
3. the photons are scattered in opposite directions
4. the scattered photons will diverge from the source tissues - Answers - 1. the
scattered photons are much lower in energy
Which of the following will decrease the integral patient dose without decreasing image
brightness
1. decreasing the x-ray field size
2. increase the distance of the image intensifier tube to the patient
, 3. increasing the kVp
4. decreasing the TPD (target to panel distance) - Answers - 4. decreasing the TPD
Mobile image intensified fluoroscopy used for diagnostic purposes must not exceed _ as
measured at 30 cm from the input surface of the fluoroscopic assembly
1. 10 R/min ( 44 m/Gy per min.)
2. 1 R/min (mGy per min.)
3. 3 R/min (0.5m/Gy per min.)
4. 5 R/min (44 m/Gy per min.) - Answers - 5 R/min (44 m/Gy per min.)
The Privacy Rule is meant to ensure that there is/are
1. security of electronic personal health information
2. standardization of electronic patient health data
3. limits PHI to a "need to know.." basis to carry out medical treatment
4. all the listed answers - Answers - 4. all the listed answers
To provide illumination stability of the virtual image during fluoroscopy, most modern
units will automatically adjust radiation levels for more dense and more radiolucent body
parts. This functionality is known as:
1. velling glare
2. image flare
3. automatic adaption
4. automatic brightness control - Answers - 4. automatic brightness control
The electronic signal which carries image information from a television camera to a
viewing monitor is termed the:
1. video signal
2. return beam
3. synchronization pulse
4. bandpass - Answers - 1. video signal
If only one personnel monitoring device is worn, it must be located
1. under the apron at the collar level
2. outside the apron at the gonad level
3. outside the apron at the collar level - Answers - 3. outside the apron at the collar
level
The random pattern of incident radiation, which often results in the appearance of
"snow" or "mottle" when viewing the virtual image is called
1. flicker effect
2. lens opacity
3. quantum noise
d. vignetting - Answers - 3. quantum noise
When wearing a "film badge" as a personnel monitoring device, it must be positioned
1. at waist level
What digital fluoroscopic imaging technique utilizes changing masks, which provides
information of changes in contrast media content within a structure
1.Time interval difference imaging
2. Mask mode fluoroscopy
3. K -edge fluoroscopy
4. Synchronized fluoroscopy - Answers - 1. Time interval difference imaging
All of the following will directly influence the table-top exposure rate except
1. Light in the fluoroscopy room
2. kVp
3. Target to panel distance
4. Filtration - Answers - 1. Light in the fluoroscopy room
Attenuation of a radiation beam's intensity as it passes through an absorber is governed
by
1. Time
2. The specific mediums density
3. The energy of the radiation
4. The thickness of the absorber traversed - Answers - 2. The specific mediums density
3. The energy or radiation
4. The thickness of the absorber traversed
What recording medium will result in the least recorded resolution
1. Spot films using a spot film camera
2. video tape recording
3. spot films using conventional cassettes
4. video disc recording - Answers - 2. video tape recording
During the period when an individual receives an occupational dose, they are _
considered to be a "member of the public"
1. sometimes
2. always
3. it depends
4. never - Answers - 4.never
A person wearing a _ apron will reduce transmitted exposure to approximately 99.9% of
the incident scatter dose
1. 1.5 mm Pb equivalent
2. 0.50 mm Pb equivalent
3. 0.25 mm Pb equivalent
4. 1.0 mm Pb equivalent - Answers - 2. 0.50 mm Pb equivalent
,If the input phosphor of an image intensifier measures 15 inches in diameter and the
output phosphor measures 1.0 inches, the minification gain would be
1. 30
2. 225
3. 175
4. 300 - Answers - Minification Gain = {15(2) = 225} input screen diameter (2) / {1.0 (2)
= 1} output screen diameter (2) = 225/1= 225
What electronic system is designed to help maintain a consistent level of image
brightness
1. photo-emitter
2. automatic brightness stabilizer
3. camera control unit
4. vidicon - Answers - 2. automatic brightness stabilizer
Energy subtraction as used in digital fluoroscopy exhibits less _ than temporal
subtraction
1. complexity
2. x-ray intensity
3. kVp
4. motion artifact - Answers - 4. motion artifact
Bone marrow dose is measured
1. directly from bone marrow
2. as estimate from gonadal dose
3. as an estimate from ESE
4. directly from the beam - Answers - 3. as an estimate from the ESE
In a television system, the ratio between the vertical resolution and the number of
horizontal scan lines is called the
1. line rate factor
2. kell factor
3. conversion factor
4. resolution factor - Answers - 2. kell factor
In an image intensification tube, to prevent light from scattering back towards the photo
cathode layer, a thin sheet of aluminum is placed onto the :
1. output phosphor
2. accelerating anode
3. photo cathode
4. input phosphor - Answers - output phosphor
Digital photo spot image recording provides which of the following advantages
1. instant image playback
2. electronic image enlargement
3. improved resolution over conventional spot film
,c. 1,2 and 3
d. 1 only - Answers - c. 1,2 and 3
California state regulations state the target to panel or target to table
1. shall not be more than 18 inches
2. shall not be less than 12 inches
3. should not be less than 12 inches
4. should not be more than 18 inches - Answers - 2. shall not be less then 12 inches
which protective barrier is used to attenuate stray radiation
1. secondary protective barrier
2. x-ray tube housing
3. primary protective barrier
4. useful beam barrier - Answers - 3. primary protective barrier
During which period of time does a generator operating in the "pulse progressive
fluoroscopy" mode produce usable xray photons
1. duty cycle
2. extinction phase
3. interrogation phase - Answers - 1. duty cycle
The squared ratio of an input screen diameter to an output screen diameter is called:
1. minification ratio
2. conversion ratio
3. magnification ratio
4. flux gain - Answers - 1. minification ratio
The electron beam of the television camera tube is _ with the television viewing monitor
1. synchronized
2. interpolated
3. interlaced
4. modulated - Answers - 1. synchronized
It is known the intensity of radiation varies inversely to the square of the distance. As
one moves away from the source of scatter radiation, they will receive less radiation
dose because _
1. the air gap has a tendency to absorb some intensity
2. the scattered photons are much lower in energy
3. the photons are scattered in opposite directions
4. the scattered photons will diverge from the source tissues - Answers - 1. the
scattered photons are much lower in energy
Which of the following will decrease the integral patient dose without decreasing image
brightness
1. decreasing the x-ray field size
2. increase the distance of the image intensifier tube to the patient
, 3. increasing the kVp
4. decreasing the TPD (target to panel distance) - Answers - 4. decreasing the TPD
Mobile image intensified fluoroscopy used for diagnostic purposes must not exceed _ as
measured at 30 cm from the input surface of the fluoroscopic assembly
1. 10 R/min ( 44 m/Gy per min.)
2. 1 R/min (mGy per min.)
3. 3 R/min (0.5m/Gy per min.)
4. 5 R/min (44 m/Gy per min.) - Answers - 5 R/min (44 m/Gy per min.)
The Privacy Rule is meant to ensure that there is/are
1. security of electronic personal health information
2. standardization of electronic patient health data
3. limits PHI to a "need to know.." basis to carry out medical treatment
4. all the listed answers - Answers - 4. all the listed answers
To provide illumination stability of the virtual image during fluoroscopy, most modern
units will automatically adjust radiation levels for more dense and more radiolucent body
parts. This functionality is known as:
1. velling glare
2. image flare
3. automatic adaption
4. automatic brightness control - Answers - 4. automatic brightness control
The electronic signal which carries image information from a television camera to a
viewing monitor is termed the:
1. video signal
2. return beam
3. synchronization pulse
4. bandpass - Answers - 1. video signal
If only one personnel monitoring device is worn, it must be located
1. under the apron at the collar level
2. outside the apron at the gonad level
3. outside the apron at the collar level - Answers - 3. outside the apron at the collar
level
The random pattern of incident radiation, which often results in the appearance of
"snow" or "mottle" when viewing the virtual image is called
1. flicker effect
2. lens opacity
3. quantum noise
d. vignetting - Answers - 3. quantum noise
When wearing a "film badge" as a personnel monitoring device, it must be positioned
1. at waist level
