CR
Converts x-rays into visible light
What is the phosphor layer
What is fill factor?
Results in severe mottle
What is under-penetration or under exposure?
Provides a short burst of exposure
What is intermittent fluoroscopy?
Sampling frequency expressed in line-pairs per millimeter
What is the Nyquist frequency?
Photostimulable phosphor found in CR plates
What is barium-fluorohalide?
Results in less patient dose
What is indirect conversion DR?
Retains 75% of the image even 8 hours after exposure
What is an exposed CR plate?
Requires rapid switching of either the kVp or the filtration between two exposures
What is dual energy subtraction?
Percentage of x-ray energy converted into light
What is conversion efficiency?
Direction in which the laser beam scans across the plate
What is fast scan direction?
What is amorphous silicon?
What is aliasing?
Delivers less scatter radiation to vital organs of personnel
What is placing the x-ray tube under the table?
Measures the overall efficiency for converting input exposure data into a useful output image
What is DQE?
Changes emitted light into an electronic signal and then amplifies the signal
What is the photomultiplier tube?
Composition of the phosphor layer in indirect DR
What is cesium iodide or gadolinium oxysulfide?
Provides scatter correction without the use of grids
What is virtual grid software?
The ratio of the input phosphor area to the output phosphor area
What is minification?
The sampling frequency must be at least 2 times the spatial frequency of the image being sampled
What is the Nyquist Theorem?
Completely removes any residual image on the plate
What is exposing to bright white light?
Stores electric charge
What is a capacitor?
Method of reducing the overall amount of noise the computer must deal with
What is grid use?
Focal point is moved closer to the input phosphor
What is done to produce magnification?
Occurs when residual electric charge is trapped
What is ghost images?