Digital imaging week 3 Flashcards

1
Q

what are the physical components of computer and an ex

A

Hardware

keyboard, CPU, monitor

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2
Q

what is a computer programs and a few examples

A

software

word, OS

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3
Q

what is used to input info and an example

A

Input device

keyboard

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4
Q

what is used to output info. to user and an ex

A

output device

monitor

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5
Q

what is used to store info and an ex

A

storage device

flash drive, hard drive

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6
Q

What does RAM stand for

A

random access memory (temporary)

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7
Q

What does ROM stand for

A

read only memory (permanent)

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8
Q

2 types of computer network

A

WAN and LAN

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9
Q

what is WAN and an ex

A

wide area network

internet

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10
Q

what is LAN and an ex

A

local area network

intranet

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11
Q

the binary system operate with a

A

2 symbol alphabet

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12
Q

0= & 1=

A

off

on

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13
Q

bit=

A

0 or 1

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14
Q

byte=

A

8 bits

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15
Q

kilobyte=

A

1024 byte

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16
Q

Megabyte=

A

1 million byte

17
Q

Gigabyte=

A

1 billion byte

18
Q

Terabyte=

A

1 thousand billion bytes

19
Q

each binary digit is called a

20
Q

an 8 word bit is a

21
Q

what is an algorithum

A

systematic application of highly complex mathematical formulas

22
Q

Algorithms are essential to the way computers _ why?

A

process info
the computer program is essentially an algorithm that tells the computer what specific steps to perform in order to carry out a specified task

23
Q

what is a compression technique achieved by compressing a range of values to a single quantum value

A

quantization

24
Q

by reducing the # of discrete symbols in a given stream, the stream becomes

A

more compressible

25
compression is used to _
free up data space
26
compression is a process of converting a into a coded image then converting a into a decoded image known as _ method
raw image coded image compression method
27
what is the purpose or compression
to make the coded image as small as possible
28
the decoded image has to be acceptably close to the
raw image
29
if the decoded image is identical to the raw image (reversible); lower compression levels
lossless
30
if the decoded image differs from the raw image (irreversible); higher compression levels
Lossy
31
process of partitioning a digital image into multiple regions (sets pixel)
segmentation
32
what is the goal for segmentation
to simplify &/or change the representation of an image into something that is more meaningful and easier to analyze
33
segmentation is typically used to locate
objects and boundaries (lines, curves, etc)
34
Digital Radiography is an image produced w/either a _ beam intercepted by a _or an x-ray beam intercepted by a
fan x-ray beam linear array of radiation detectors photostimulable phosphor plate or a direct capture solid-state device
35
Teleradiography is the transmission of
patients images from one location to another for the purpose of sharing studies with other physicians
36
Teleradiography improves care by allowing radiologists to
provide services w/out being at the location
37
Teleradiography is used through
internet, phone, WAN, and LAN