Computed Radiography
The photostimulable phosphor used in computed radiograpic imaging plates.
What is europium activated barium fluorohalide
The input phosphor is made of
The scintillator in an indirect capture CCD imaging system is
What is cesium iodide
A graph of the number of pixels of each gray value in the digital radiographic image
What is a histogram
Leakage radiation must be limited to less than
What is 1 mGy/hour at 1 meter from the source
The random, disorganized crystals in an image phosphor layer.
What is turbid
The component of an image intensifier that converts light to electrons is composed of
What is cesium and antimony (in the photocathode)
The photodetector in an indirect capture TFT imaging system
What is amorphous silicon
The preprocessing function that adjusts a radiographic image for over or under exposure
What is automatic rescaling
The bucky slot cover and protective curtain must contain at least
What is 0.25 mm Pb equivalence
Where the electrons from the ionized phosphor crystals are "trapped" in the imaging plate.
What is the conduction band
The brightness gained due to the crowding of light photons onto the output phosphor
What is minification gain
The photoconductor in a direct capture TFT imaging system
What is amorphous selenium
The S value that the exposure indicator is based upon.
What is S(ave)
The image intensifier housing must contain at least
What is 2.0 mm Pb equivalence
In the CR reader, light photons are released from the imaging plate with a ________ and collected by a PMT or CCD.
What is a red laser
The elements in the image intensifier that converts electrons into light
What is silver activated zin cadmium sulfide (output phosphor)
What an indirect capture DR system has that a direct capture DR system does not
What is a scintillator
This process controls the contrast scale in a digital image
What is LUTs (look up tables)
The source to skin distance for a portable fluoroscopy unit must be at least
What is 12 inches (30 cm)
The rate that data is acquired from the imaging plate is called the ____.
What is sampling frequency
What is 2-5
What is an ADC
A "spike" on the right on a visualized histogram represents
What is "raw radiation"
Fluoroscopy exposure at tabletop for a standard ABS image intensified system is limited to
What is 100 mGy/min