Digital Imaging Ch 14/15
Computed radiography imaging produces _____ gray levels.
10,000
In computer language, _____ is a "word."
2 bytes
The official computer language used by the U.S. Department of Defense is _____.
ADA
The _____ programming language was developed for coding business data.
COBOL
The active storage of a computer is stored in _____ chips.
DRAM, SRAM, ROM
The oldest computer language for writing scientific and mathematical programs is _____.
FORTRAN
Digital radiography was first introduced by _____.
Kodak 1975
_____ is a computer language used to write some applications programs.
QuickBasic
The _____, developed in 1951, was the first commercially successful general-purpose stored-program electronic digital computer.
UNIVAC
Europium is the _____ of the photostimulable phosphor.
activator
A tape, diskette, hard disk or optical disk is used to _____.
archive files
The _____ represents zero or one.
bit
A computer first uses its _____ program when it is turned on.
bootstrap
The _____ controls data transfer between the main memory and the input and output hardware
central processing unit
The output signal from the photostimulable phosphor plate is converted from analog to digital by the _____.
computer controls
With computed radiography the contrast is _____.
constant regardless of radiation exposure
[true/false] The 400 speed film-screen systems are still faster than computed radiography image receptors.
false
[true/false] The digital imaging plate can sit for some time after the erase cycle.
false
[true/false]Spatial resolution, contrast resolution, noise, and artifacts are identical in screen-film imaging and computed radiography.
false
_____ is prevented by flooding the erased imaging plate with bright light.
ghosting
The following computer component temporarily stores data for processing.
hard disk drive
The laser beam must be less than 100 nm in diameter in order to maintain _____.
high spatial resolution
The computed radiography cassette is called a(n) _____ plate.
imaging
A photostimulable phosphor in a metastable state will emit light _____.
immediately, over time, and when stimulated by light
Computer hardware includes the _____.
keyboard, central processing unit, motherboard
Computed radiography and screen-film imaging both have a(n) _____.
latent image
The computed radiography reader is made up of _____, _____, and _____ modules.
mechanical, optical, computer
The four steps of creating an image with computed radiography are _____.
metastable, stimulate, read, erase
All of the below are examples of a type of computer storage except:
microprocessor
The _____ is an example of computer input hardware.
mouse
Automatic bank tellers are _____ computer systems
online
MAC-OS, Windows, and Unix are three different _____ systems.
operating
The laser is one of the _____ features of the computed radiography reader.
optical
Computed radiography screens respond to radiation with _____.
photostimulable luminescence
The photostimulable phosphor screen is handled in a _____.
reader
Switching from screen-film imaging to computed radiography can _____ patient dose.
reduce
When switching from screen-film imaging to computed radiography, which step is eliminated?
reloading the cassette
The principal source of noise in computed radiography is _____.
scatter radiation
Modern day computers use _____ to store information
silicon chips
Following the laser stimulation of the photostimulable phosphor, the excited electrons are _____.
still excited
Optical filters are used to filter out the _____ light and allow the _____ light to reach the photodetector.
stimulating, emitted
What is the form of radiology that allows for the transfer of images to remote sites for interpretation.
teleradiology
[true/false] Computed radiography cassettes and film/screen cassettes can be used interchangeably with any x-ray imaging system.
true
The first generation of computers was run with _____.
vacuum tubes
The computed radiography image has _____.
wide exposure latitude and improved contrast resolution
