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Module 3-Display

Advanced Modalities

QuestionAnswer
What is another word for electron gun? Cathode
What creates images by beaming electrons towards an anode? Cathode, electron gun
Of the two types of monitors, CRT and LCD, which one provides more luminance and better color reproduction? CRT
Which is more durable of the two types of monitors, CRT or LCD? CRT
Which type of monitor has less screen glare and better resolution and is easier to move and reposition, CRT or LCD? LCD
How is a LCD monitor's resolution determined? pixel pitch
What is pixel pitch? the distance between the cells of the same color
How is the vertical and horizontal resolution determined? pixel pitch in that given direction
The smaller the pixel size, the ________ the spatial resolution. greater
______ ______ refers to the proportional relationship of the width and height of the display screen. aspect ratio
Most CRT monitors have an aspect ration of ____ whereas LCD monitors have an aspect ration of _____ when viewed in a landscape format. 4:3, 16:9
Which will produce a better image, 1x1 matrix or 100 x100 matrix? 100 x 100
The _____ the matrix, the _____ the pixel value in the matrix on the display monitor, and the ______ the resolution. larger; smaller; greater
What is another term for pixel pitch? dot pitch
_____ ______ determines the sharpness of an image. Pixel pitch
The closer the pixels are together, the _____ the image. sharper
In a CRT monitor, what is the pitch? the distance between phosphor dots
In an LCD monitor, what is pitch? the distance between cells of the same color
How many shades of gray does the display monitor need to demonstrate in order to accurately display a radiograph? 256 shades
What is the contrast resolution of a monitor? the difference btwn the max and the min luminance of the display
____ _____ determines the colors that can be displayed and depends on the graphics adapter and color capabilities of the monitor. color depth
_____ ____ _____ refers to the number of bits used to create the color of a single pixel. color bit depth
When referring to a video display, what does maximal luminance mean? monitor brightness
What is the mininium luminance allowed by the ACR? 171 candelas per square meter
What is another term for minimum level of luminance? black level
Which type of monitor has a lower black level, CRT or LCD? CRT
What term refers to the number of times an image is drawn on the screen each second? refresh rate
What is the refresh rate range? 60-120 images per sec
_____ is the delayed light emission after a CRT screen refreshes. persistence
______ helps when viewing static images, but it produces ____ ____ in a cine-type display. persistence ; image lag
Technologist workstation monitors are best used in what type of areas? brightly lit areas
Its important to recognize that modifying _______ and ____ _____ alters the exam and permanent patient record. demographic ; image data
What is commonly known as stitching? opening processed images on the workstations and using software function to join the separate images into a single-image format
How many cassettes are processed for a long-leg exam? 3
How many plates are processed for a scoliosis exam? 2
Software function allows a black mask to be placed over bright areas, a practice known as ____. shuttering
What are some other terms for shuttering? black border, black mask, and collimation
______ is the term used when changing the window width and level of an image. windowing
What affect to the image does changing the width and level of an image? adjusts the brightness and contrast
________ refers to the overall lightness or darkness of an image brightness
_________ refers to the degree of differences in densities of adjacent structures on an image. contrast
Created by: erikasmith28
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