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RADT 150 > Unit 4 Digital Image Systems > Flashcards

Unit 4 Digital Image Systems Flashcards

1
Q

Basis of digital imaging has 2 computer processing methods

A

Analog and digital

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2
Q

computers handle data composed of continuous signals (current)

A

analog

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3
Q

computers handle data in definite quanities (discrete numbers) used in medical imaging

A

digital

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4
Q

photon stream- constant stream ADC

A

analog digital converter

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5
Q

converts analog photon stream to digital information

A

ADC analog digital converter

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6
Q

2 types of information from computer

A

operating instructions (program)
data (collected)

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7
Q

instructions for calculations. alternative functions performed as variables are processed

A

software

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8
Q

input and out put devices. physical components to the computer

A

hardware

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9
Q

changing analog screen to digital. discrete density values

A

digital

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10
Q

instructions

A

software program

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11
Q

binary language

A

software program

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12
Q

1 and 0

A

on and off

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13
Q

1=

A

1

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14
Q

2=

A

1,0

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15
Q

3=

A

1,1

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16
Q

4=

A

1,0,0

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17
Q

binary number (binary digits)

A

BIT

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18
Q

8 bit word

A

BYTE

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19
Q

10 megabyte memory holds ___ bits of information

A

80,000,000

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20
Q

central processing unit

A

CPU

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21
Q

directs information to and from components within system

A

CPU central processing unit

22
Q

parallel or series connections between components

A

bus

23
Q

faster, simultaneous transmission, used in CT

A

parallel connections

24
Q

slower, information transferred in sequence

A

series

25
Q

specialized peripheral computer processing units

A

array processors

26
Q

uses memory to perform simultaneous mathematical calculations in parallel at high speeds

A

array processors

27
Q

useful for repetitive calculations such as CT, MRI

A

array processors

28
Q

extracts information without alteration

A

read memory

29
Q

replaces old memory with new information

A

write memory

30
Q

read only memory

A

ROM

31
Q

random access memory

A

RAM

32
Q

basic operating instructions

A

ROM

33
Q

temporary storage of information during usage

A

RAM

34
Q

CD
DVD
disk

A

memory storage

35
Q

keyboard
mouse
scanner
barcode reader
joystick/controllers

A

input devices

36
Q

CRT monitor
printers/ laser film recording systems

A

output devices

37
Q

memory store, input devices, output devices

A

peripheral devices

38
Q

primary mathematical method to convert data to useful information (images)

A

Fourier Transmission

39
Q
  1. permits reconstruction of portions of data
  2. allows for transmission of densities to specific locations
  3. information from detectors is processed through a variety of math formulas (ALGORITHIMS/ kernels)
  4. digital imaging- algorithm= image reconstruction
A

fourier transmission

40
Q

set of instructions

A

algorithum

41
Q

kodak

A

best printers

42
Q

made sure they were all universal to every system

A

DICOM standard

43
Q

digital imaging and communication in medicine standard (compatibility)

A

DICOM standard

44
Q

designed to ensure that all equipment from all manufacturers speak same language and connect with similar device lines

A

DICOM standard

45
Q

output devices (laser printer, monitors)

A

DICOM 1

46
Q

input and output devices

A

DICOM 2

47
Q

picture archival communication systems

A

PACS

48
Q

computerized storage and transmission systems (remote locations)
can be manipulated

A

PACS

49
Q

store on a server and can pull up anytime anywhere

A

PACS

50
Q

diff time of day from other parts of the world. have radiologists read anywhere

A

night hawking thanks to PACS

RADT 150 (6 decks)

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