RTBC Flouro Overview |Exam
|Questions with Complete Answers
Which of the following best describes image intensifiers at the basic, technology level?
- ANSWER Energy conversion tubes
Which of the following will improve an image intensifier's efficiency? - ANSWER Contain
a perfect vacuum as part of its tube design.
X-rays that emanate from the patient or initially detected by what component of
the intensifier tube during fluoroscopy? - ANSWER Input phosphor
The product of minification gain and flux gain is calculated to determine which of
the following? - ANSWER Brightness gain
Which technology collects light from the output phosphor to create a television image
for viewing? - ANSWER Solid-state charge-coupled device (CCD)
Which of the following statements is accurate regarding image intensifiers? - ANSWER
The photo cathode layer of an image intensifier is responsible for the liberation of
electrons, which are then accelerated toward an anode disc
The voltage difference between the photo cathode and anode assembly in an
image intensifier is - ANSWER 25,000 to 30,000 VOlts
, Which of the following is the first order of events when operating an image intensifier?
- ANSWER X-rays, striking the input phosphor
Which two of the following events need to occur before light emission from
electron excitation - ANSWER - light emission from the phosphor
- Electrons emitted upon light stimulation
What is the vault potential difference needed to accelerate electrons from the
cathode side to the and inside of an image intensifier tube - ANSWER 25,000 to 35,000
Which of the following is emitted at the output phosphor? - ANSWER Visible light
Which of the following definitions accurately describes the term "gain" in the context
of fluoroscopic image intensification? - ANSWER Amplification of electrical signal
The photo cathode in an image intensifier converts - ANSWER Visible light to electrons
The ability of an image intensifier to increase fluoroscopic image illumination is
referred to as - ANSWER Brightness gain
To maintain the same brightness gain, a decrease in flux gain would require an
- ANSWER Increase in minification gain
Image intensifier input phosphor and photocathode surfaces are - ANSWER Concave in
shape
When three incident photon strike the input phosphor and produce 4500 light
photons from the output, phosphor, the - ANSWER Flux gain is 1500
|Questions with Complete Answers
Which of the following best describes image intensifiers at the basic, technology level?
- ANSWER Energy conversion tubes
Which of the following will improve an image intensifier's efficiency? - ANSWER Contain
a perfect vacuum as part of its tube design.
X-rays that emanate from the patient or initially detected by what component of
the intensifier tube during fluoroscopy? - ANSWER Input phosphor
The product of minification gain and flux gain is calculated to determine which of
the following? - ANSWER Brightness gain
Which technology collects light from the output phosphor to create a television image
for viewing? - ANSWER Solid-state charge-coupled device (CCD)
Which of the following statements is accurate regarding image intensifiers? - ANSWER
The photo cathode layer of an image intensifier is responsible for the liberation of
electrons, which are then accelerated toward an anode disc
The voltage difference between the photo cathode and anode assembly in an
image intensifier is - ANSWER 25,000 to 30,000 VOlts
, Which of the following is the first order of events when operating an image intensifier?
- ANSWER X-rays, striking the input phosphor
Which two of the following events need to occur before light emission from
electron excitation - ANSWER - light emission from the phosphor
- Electrons emitted upon light stimulation
What is the vault potential difference needed to accelerate electrons from the
cathode side to the and inside of an image intensifier tube - ANSWER 25,000 to 35,000
Which of the following is emitted at the output phosphor? - ANSWER Visible light
Which of the following definitions accurately describes the term "gain" in the context
of fluoroscopic image intensification? - ANSWER Amplification of electrical signal
The photo cathode in an image intensifier converts - ANSWER Visible light to electrons
The ability of an image intensifier to increase fluoroscopic image illumination is
referred to as - ANSWER Brightness gain
To maintain the same brightness gain, a decrease in flux gain would require an
- ANSWER Increase in minification gain
Image intensifier input phosphor and photocathode surfaces are - ANSWER Concave in
shape
When three incident photon strike the input phosphor and produce 4500 light
photons from the output, phosphor, the - ANSWER Flux gain is 1500
