Final Radiographic Imaging and Physics
Exam Questions and Answers
In modern imaging systems, the components for rectification are _____. - Correct
Answers -solid state semiconductors
What is the industry standard formula for calculating high voltage generator power? -
Correct Answers -Power = max mA (@100 kVp and 100 ms) ´ 100 kVp
The inverse square law has the same affect on optical density and x-ray _____. -
Correct Answers -Intensity
Exposure
Quantity
A diode allows electrons to flow from - Correct Answers -cathode to anode
A dual focus tube has two - Correct Answers -filaments
Image field size is determined by _____ size and gray scale - Correct Answers -Matrix
a screen that emits light after an exposure terminates is exhibiting - Correct Answers -
screen lag
The only difference between x-rays and gamma rays is their - Correct Answers -origin
The national standard for image transmission and teleradiology is the _____ format -
Correct Answers -DICOM
The x-ray generator with the lowest power rating is the _____ imaging system - Correct
Answers -single phase
The use of an image receptor with _____ DQE can result in _____ patient doses. -
Correct Answers -High, lower
Low, high
The two basic components of radiographic film are the _____ and the _____. - Correct
Answers -Base, emulsion
The base + fog of a film is shown below the _______ of characteristic curve - Correct
Answers -toe portion
, Distortion can be reduced by - Correct Answers -placing the object plane perpendicular
to the image plane
What are the fundamental particles of an atom - Correct Answers -proton, electron,
neutron
Exposure is measured by manipulating _____ by _____. - Correct Answers -Exposure
rate, exposure time
A person subjected to 50 GY to the whole body may survive for _____ before death
occurs - Correct Answers -3 days
Devices designed to measure total accumulated radiation intensity are called _____. -
Correct Answers -Dosimeters
The Buckys slot opening in the side of the table must be automatically covered with
_____ mm Pb during fluoroscopy. - Correct Answers -0.25
Gonadal responses to radiation have been observed at doses as low as _____ Gy. -
Correct Answers -0.1
Most mammography units operate with _____ generators. - Correct Answers -high
frequency
What is not part of PACS?
Film storage, a display system, a network, image acquisition - Correct Answers -Film
storage
The three primary geometric factors affecting image quality are _____. - Correct
Answers -Magnification, distortion, and focal spot blur
Screen characteristics are determined by
the _____. - Correct Answers -size of the phosphor crystals, thickness of the phosphor
layer, phosphor composition
A digital display device with higher megapixels has better spatial resolution / True or
False - Correct Answers -True
X-ray beam quality is improved by _____. - Correct Answers -increasing filtration
A exposure taken at 100 KVP would have a continuous emission spectrum with a
maximum energy of _____ KEV - Correct Answers -100
The number of gray shades that an imaging system can reproduce is called its _____. -
Correct Answers -dynamic range
Exam Questions and Answers
In modern imaging systems, the components for rectification are _____. - Correct
Answers -solid state semiconductors
What is the industry standard formula for calculating high voltage generator power? -
Correct Answers -Power = max mA (@100 kVp and 100 ms) ´ 100 kVp
The inverse square law has the same affect on optical density and x-ray _____. -
Correct Answers -Intensity
Exposure
Quantity
A diode allows electrons to flow from - Correct Answers -cathode to anode
A dual focus tube has two - Correct Answers -filaments
Image field size is determined by _____ size and gray scale - Correct Answers -Matrix
a screen that emits light after an exposure terminates is exhibiting - Correct Answers -
screen lag
The only difference between x-rays and gamma rays is their - Correct Answers -origin
The national standard for image transmission and teleradiology is the _____ format -
Correct Answers -DICOM
The x-ray generator with the lowest power rating is the _____ imaging system - Correct
Answers -single phase
The use of an image receptor with _____ DQE can result in _____ patient doses. -
Correct Answers -High, lower
Low, high
The two basic components of radiographic film are the _____ and the _____. - Correct
Answers -Base, emulsion
The base + fog of a film is shown below the _______ of characteristic curve - Correct
Answers -toe portion
, Distortion can be reduced by - Correct Answers -placing the object plane perpendicular
to the image plane
What are the fundamental particles of an atom - Correct Answers -proton, electron,
neutron
Exposure is measured by manipulating _____ by _____. - Correct Answers -Exposure
rate, exposure time
A person subjected to 50 GY to the whole body may survive for _____ before death
occurs - Correct Answers -3 days
Devices designed to measure total accumulated radiation intensity are called _____. -
Correct Answers -Dosimeters
The Buckys slot opening in the side of the table must be automatically covered with
_____ mm Pb during fluoroscopy. - Correct Answers -0.25
Gonadal responses to radiation have been observed at doses as low as _____ Gy. -
Correct Answers -0.1
Most mammography units operate with _____ generators. - Correct Answers -high
frequency
What is not part of PACS?
Film storage, a display system, a network, image acquisition - Correct Answers -Film
storage
The three primary geometric factors affecting image quality are _____. - Correct
Answers -Magnification, distortion, and focal spot blur
Screen characteristics are determined by
the _____. - Correct Answers -size of the phosphor crystals, thickness of the phosphor
layer, phosphor composition
A digital display device with higher megapixels has better spatial resolution / True or
False - Correct Answers -True
X-ray beam quality is improved by _____. - Correct Answers -increasing filtration
A exposure taken at 100 KVP would have a continuous emission spectrum with a
maximum energy of _____ KEV - Correct Answers -100
The number of gray shades that an imaging system can reproduce is called its _____. -
Correct Answers -dynamic range
