Oldie But a Goodie
The Primary parts of a CR system is
Cassette
Photostimuble Plate (PSP)
Plate Reader
Computer workstation
The two general categories of DR systems are referred to
Indirect and Direct Capture
A graphic representation of a data set
Histogram
This uses a fluorescent (light producing) screen and a device that converts the light to electricity.
Phototimer
Flux Gain x Minification
Brightness Gain
The PSP Plate is made up of several layers, name these layers in order
Protective
Phosphor
Reflective
Conductive
Support
What are the two forms of indirect capture?
Charged Coupled Device
Xray Scintillator
The size of the _______ determines the resolution
Matrix
A hollow cell that contains air and is connected to the timer circuit via an electrical wire is known as
Ionization chamber or ion chamber
An expression of the degree to which the image is minified from input phosphor to output phosphor.
Minification Gain
This has a columnar phosphor crystals within the active layer resembling needles standing on end and packed together
Structured Phosphor Layer
The other indirect capture method also uses a scintillator with cesium iodide or gadolinium oxysulfide as the phosphor, a photodetector and a?
TFT array
The available grayscale and refers to the number of the shdes of a gray that can be displayed within a pixel is known as?
Bit Depth
AEC devices are equipped with _______ that allow the radiographer to adjust the amount of preset radiation detection values.
Density Controls
A function of the Fluoroscopic unit that maintains the overall appearance of the fluoroscopic image by automatically adjusting KVP and/or MA
ABC - automatic brightness control
Silvery rare earth metal used as an activator for phosphor is known as
Europium
The direct capture method that avoids the extra step and the problem by not using a _____ and instead uses a ____.
Scintillator, photodetector
The range of exposure values to the receptor that produce an acceptable range densities for diagnostics purposes..
Exposure latitude
Shortest exposure time that the system can produce
Minimum Response Time
The combined result is an unequal magnification (distortion) of the image creating what is called..
This is used to sense the light release from the PSP plate during scanning..
Photodetector
Amorphous Selenium make up the
Photodetector
The range of exposures intensities that an image receptor can repsond to an use to acquire image data..
Dynamic Range
Maximum length of time the X-Ray exposure continues when using an AEC system..
Back-Up Timer
When operated in ________ ________ the voltage to the electrostatic focusing lenses is increased.
Magnification Mode