digital radiography

Question 1

digital imaging

Answer 1

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

Question 2

teleradiaology

Answer 2

moving images via telephone line to from remote locations

Question 3

in the 1970s Godfrey Houndfield invented what

Answer 3

CT (computed tomography)

Question 4

computed radiaography (CR)

Answer 4

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

Question 5

when was CR first introduced commercially in the united states

Answer 5

1983

Question 6

digital radiography (DR)

Answer 6

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

Question 7

indirect capture digital radiography

Answer 7

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

Question 8

direct capture digital radiography

Answer 8

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

Question 9

what are most storage phosphor plates today made of

Answer 9

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

Question 10

what color laser light is used to release the latent image

Answer 10

focused laser light

Question 11

what is PACS

Answer 11

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

Question 12

computer

Answer 12

programable electronic device that can store, retrieve and process data

Question 13

input devices

Answer 13

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

Question 14

output devices

Answer 14

monitors, printers, speakers

Question 15

CPU

Answer 15

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

Question 16

binary code

Answer 16

machine language of 1s and 0s

Question 17

bit

Answer 17

single unit of date

Question 18

byte

Answer 18

made up of 8 bits

Question 19

motherboard

Answer 19

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

Question 20

BIOS

Answer 20

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

Question 21

the bus

Answer 21

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

Question 22

memory

Answer 22

used to store information currently being processed with in the CPU

Question 23

RAM

Answer 23

short term storage for open programs

Question 24

ports

Answer 24

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

Question 25

hard drive

Answer 25

main repository for programs and documents on a PC

Question 26

pixel

Answer 26

an individual controllable set of dot triads

Question 27

resolution

Answer 27

the number of pixels on a display

Question 28

matrix

Answer 28

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

Question 29

dot pitch

Answer 29

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

Question 30

aspect ratio

Answer 30

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

Question 31

operating system (OS)

Answer 31

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

Question 32

LAN

Answer 32

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

Question 33

WAN

Answer 33

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.

Question 34

DICOM

Answer 34

digital imaging and communications in medicine

Question 35

window level

Answer 35

controls how light or dark the image is

Question 36

window width

Answer 36

controls the ratio of black to white or contrast