MRT 1210 – Fluoroscopy Questions With Complete
Solutions
Can flux gain ever change in fluoroscopic system? Correct
Answers No
Components of fluoroscopy equipment Correct Answers - x-ray
tube and generator
- The image intensifier
- The video monitoring system
Components of the image intensifier? Correct Answers - Input
phosphor
- Photocathode
- Electrostatic focusing lenses
- Anode
- Output phosphor
Does magnification change the size of the output phosphor?
Correct Answers NO
During magnification fluoroscopy is the input phosphor larger or
smaller? Correct Answers smaller
During magnification, will technical factors increase or
decrease? Correct Answers increase
H5P Questions Correct Answers H5P Questions
,How can patient prep cause artifacts? Correct Answers -Due to
having radiopaque objects in the field of exposure that can
obscure anatomy
- They didn't properly perform preparation for the procedure
(bowel prep etc.)
How can patient preparation cause artifacts? Correct Answers -
Must follow preparation as determined
- Not have radiopaque objects in the field of exposure
How can technologist skill cause artifact? Correct Answers -not
having good communication with the patient to reduce motion,
confirm preparation and obtain patient cooperation
- Use lowest possible OID
-must be aware of the fluoro time and record the total time
-reduce patient and occupational exposure, must adhere to safe
radiation practices.
How do electrostatic lenses change the magnification of the
image? Correct Answers - By changing the focal point of the
photoelectrons
How does a fluoroscopic x-ray tube differ from a diagnostic x-
ray tube? Correct Answers Fluoroscopic tubes are designed to
operate for longer period of time at lower mA
How does a single-detector flat-panel unit differ from a multi-
detector flat-panel unit? Correct Answers ??
How does ABC fix brightness? Correct Answers Adjusts the
mA adn kVp to maintain constant output brightness
, - generates more xrays (mA)
- produces more penetrating xrays
How does digitizing the image intensifier image? Correct
Answers - CCD is coupled to the output phosphor screen
- Fiber optics straightens the light to be received by the CCD
- Light is connected to the ABC circuitry of the image intensifier
- Once light is converted to an electronic signal it is sent to an
ADC and then to the computer for processing
How does flat panel digital fluoro? Correct Answers - Units are
pulse progressive exposure, used to be synchronized with the
detector signal
How does Image Intensifier Digital Fluoro work? Correct
Answers - Light emitted from the output screen of a
conventional image intensifier
- Light is absorbed by the CCD system
- Light is converted to an electronic signal in a matrix and sent
to an ADC
- Electronic signal is sent to the computer for processing
How does the electrostatic lense works? Correct Answers - As
photoelectrons travel to the output phosphor, they will cross at a
focal point where the image is reversed from the input phosphor.
How exactly does ABC work? Correct Answers - Most monitor
the current flowing between the cathode and the anode of the
image intensifier or the intensity of the output screen
Solutions
Can flux gain ever change in fluoroscopic system? Correct
Answers No
Components of fluoroscopy equipment Correct Answers - x-ray
tube and generator
- The image intensifier
- The video monitoring system
Components of the image intensifier? Correct Answers - Input
phosphor
- Photocathode
- Electrostatic focusing lenses
- Anode
- Output phosphor
Does magnification change the size of the output phosphor?
Correct Answers NO
During magnification fluoroscopy is the input phosphor larger or
smaller? Correct Answers smaller
During magnification, will technical factors increase or
decrease? Correct Answers increase
H5P Questions Correct Answers H5P Questions
,How can patient prep cause artifacts? Correct Answers -Due to
having radiopaque objects in the field of exposure that can
obscure anatomy
- They didn't properly perform preparation for the procedure
(bowel prep etc.)
How can patient preparation cause artifacts? Correct Answers -
Must follow preparation as determined
- Not have radiopaque objects in the field of exposure
How can technologist skill cause artifact? Correct Answers -not
having good communication with the patient to reduce motion,
confirm preparation and obtain patient cooperation
- Use lowest possible OID
-must be aware of the fluoro time and record the total time
-reduce patient and occupational exposure, must adhere to safe
radiation practices.
How do electrostatic lenses change the magnification of the
image? Correct Answers - By changing the focal point of the
photoelectrons
How does a fluoroscopic x-ray tube differ from a diagnostic x-
ray tube? Correct Answers Fluoroscopic tubes are designed to
operate for longer period of time at lower mA
How does a single-detector flat-panel unit differ from a multi-
detector flat-panel unit? Correct Answers ??
How does ABC fix brightness? Correct Answers Adjusts the
mA adn kVp to maintain constant output brightness
, - generates more xrays (mA)
- produces more penetrating xrays
How does digitizing the image intensifier image? Correct
Answers - CCD is coupled to the output phosphor screen
- Fiber optics straightens the light to be received by the CCD
- Light is connected to the ABC circuitry of the image intensifier
- Once light is converted to an electronic signal it is sent to an
ADC and then to the computer for processing
How does flat panel digital fluoro? Correct Answers - Units are
pulse progressive exposure, used to be synchronized with the
detector signal
How does Image Intensifier Digital Fluoro work? Correct
Answers - Light emitted from the output screen of a
conventional image intensifier
- Light is absorbed by the CCD system
- Light is converted to an electronic signal in a matrix and sent
to an ADC
- Electronic signal is sent to the computer for processing
How does the electrostatic lense works? Correct Answers - As
photoelectrons travel to the output phosphor, they will cross at a
focal point where the image is reversed from the input phosphor.
How exactly does ABC work? Correct Answers - Most monitor
the current flowing between the cathode and the anode of the
image intensifier or the intensity of the output screen
