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x-ray > digital radiography > Flashcards

digital radiography Flashcards

1
Q

digital imaging

A

any imaging acquisition process that produces an electronic image that can be viewed and manipulated on a computer

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2
Q

teleradiaology

A

moving images via telephone line to from remote locations

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3
Q

in the 1970s Godfrey Houndfield invented what

A

CT (computed tomography)

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4
Q

computed radiaography (CR)

A

cassette-based digital radiography, the digital acquisition modality that uses storage phosphor plates to produce projection images

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5
Q

when was CR first introduced commercially in the united states

A

1983

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6
Q

digital radiography (DR)

A

cassette-less systems use an x-ray absorber material coupled to a flat panel detector or a charged coupled device (CCD) to form the image

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7
Q

indirect capture digital radiography

A

absorb x-rays and convert them into light ; the light is read by a thin film transistor (TFT) or CCD array and then converted into an electrical signal that is sent to the computer for processing and viewing

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8
Q

direct capture digital radiography

A

devices convert in the incident x-ray energy directly into and electrical signal, typically using a photoconductor as the x-ray absorber and send the electrical signal to the computer for processing and viewing

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9
Q

what are most storage phosphor plates today made of

A

barium fluorohalide (where halide is bromine or iodine) with emporium as an activator

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10
Q

what color laser light is used to release the latent image

A

focused laser light

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11
Q

what is PACS

A

picture archival and communication system ; a networked group of computers, servers, and archives that can be used to manage digital images

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12
Q

computer

A

programable electronic device that can store, retrieve and process data

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13
Q

input devices

A

keyboards, mouse, microphones, barcode readers, touch screens, and image scanners

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14
Q

output devices

A

monitors, printers, speakers

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15
Q

CPU

A

central processing unit ; smal chip found on the motherboard ; brain of the computer

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16
Q

binary code

A

machine language of 1s and 0s

17
Q

bit

A

single unit of date

18
Q

byte

A

made up of 8 bits

19
Q

motherboard

A

largest circuitry board inside the computer and it contains many important small components to make the computer function properly

20
Q

BIOS

A

basic input/ouput system ; helps bring computer to life, runs start up diagnostics on the system to make sure all of the peripherals are functioning properly

21
Q

the bus

A

a series of connections, controllers, and chips that creates the information highway of the computer ; allows for the information to flow within the computer

22
Q

memory

A

used to store information currently being processed with in the CPU

23
Q

RAM

A

short term storage for open programs

24
Q

ports

A

collection of connectors sticking out of the back of the PC that link adapter cards, drives, printers, monitors, scanners,

25
Q

hard drive

A

main repository for programs and documents on a PC

26
Q

pixel

A

an individual controllable set of dot triads

27
Q

resolution

A

the number of pixels on a display

28
Q

matrix

A

a rectangular or square table of numbers that represents the pixel intensity to be displayed on the monitor

29
Q

dot pitch

A

measurement of how close the dots are located to one another within a pixel

30
Q

aspect ratio

A

ratio of the width of the monitor to the height of the monitor

31
Q

operating system (OS)

A

the software that controls the computer hardware and acts as a bridge between applications and the hardware

32
Q

LAN

A

local area network ; small area networked with a series of cables or wireless access points that allow computers to share information and devices on the same network

33
Q

WAN

A

wide area network ; spans a large area city, state, nation, continent or the world.connect computers that are not physically attached to each other but rather connected through telephone lines, satellite links.

34
Q

DICOM

A

digital imaging and communications in medicine

35
Q

window level

A

controls how light or dark the image is

36
Q

window width

A

controls the ratio of black to white or contrast

x-ray (8 decks)

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