Section 3 Computed Imaging

Question 1

What is a bit?

Answer 1

0 or 1 in binary code

Question 2

How many bits are in a bite?

Answer 2

There are eight bits to a bite, each bite equals a alphanumeric (a,b,c)

Question 3

What is binary code

Answer 3

A code formed by transistors switching on and off over and over according to data that is given to the computer.

Question 4

What is a computer

Answer 4

A programmable electronic device that can store retrieve and process data

Question 5

What is a motherboard and what does it contain

Answer 5

The largest circuitry board inside the computer which contains things like

the CPU, the BIOS, the bus, the memory, ports, and CMOS.

Question 6

What is the BIOS

Answer 6

This is the basic input or output system
which has simple sets of instructions for the computer. It is used during the startup process of the computer and runs diagnostics for functioning. It oversees functioning of the computer.

Question 7

What is the bus

Answer 7

The bus provides the connections for the information to flow within the computer.

Question 8

What are other types of buses uses besides for the motherboard found in a computer

Answer 8

For the accelerated Graphics port for video, for the small computer system interface, and for the USB

Question 9

What is the memory of a computer

Answer 9

The storage for information being processed in the cpu.

Question 10

What is memory also known as?

Answer 10

Ram which is short-term storage.

Question 11

What is a port on a computer

Answer 11

The computers ports are a collection of connectors out of the back of the PC that link cards, drives, printers, scanners, keyboards, mice and other devices.

Question 12

What is a parallel port?

Answer 12

A 25 pin connector synonymous with the printer port. It can send 8 Bits of data through each connection

Question 13

What is a Serial port

Answer 13

Mostly of the nine pin variety but can have up to 25 pin connectors and can only send one bit of data down a single wire.

Question 14

What is the most common wired connection used between devices

Answer 14

The USB connection

Question 15

What is the CMOS

Answer 15

A special type of memory chip that uses a small rechargeable or lithium battery to retain information about the PC’s Hardware while the computer is turned off

Question 16

What is the power supply

Answer 16

The power supply delivers all electricity to the PC and contains a fan to keep the computer cool

Question 17

What is the hard drive

Answer 17

The hard drive is the main repository for programs and documents on a PC made of many hard thin magnetic platters stacked on top of the other

Question 18

What are five of the different Mouse connections

Answer 18

Cereal, bus, ps/2, usb, infrared, mechanical, optical, opto mechanical

Question 19

What is screen resolution

Answer 19

Number of pixels on a screen

Question 20

What is dot pitch

Answer 20

The meazurement of how close the dots are located to one anothet within a pixel

Question 21

What is a dot tried

Answer 21

The makeup of a pixel. A grouping of a red dot, green dot, and blue dot.

Question 22

What is the refresh rate

Answer 22

How fast the monitor rewrites the screen

Question 23

What is the aspect ratio

Answer 23

Ratio of width if the monitor to the height of the monitor. Most gave one of 4:3

Question 24

What is the viewable area of the monitor?

Answer 24

Diagonal measurement from one corner to the other.

Question 25

CRT monitors (cathode ray tube) work like what tube?

Answer 25

Xray tube

Question 26

LCD display is what

Answer 26

Light crystal display monitor using light displayed through liquid crystal that moves with electric current

Question 27

What is an operating system

Answer 27

The bridge and software between apps and the hardware.

Question 28

Three major OS of today

Answer 28

Windows, macintosh, and unix/linux

Question 29

Four types of OSs

Answer 29

Real time, (specific machinery like xray console) Single user/task (computer do 1 task efficiently) Singleuser, multitask (one user do many things) Multiuser (one server for multiple people)

Question 30

What is a computer network?

Answer 30

1. Two or more objects sharing resources or info 2. Computers and server connected by communication channels sharing data and program resources

Question 31

What is LAN

Answer 31

Local area network, small area with cables or wireless access points that allow sharing of data

Question 32

What is WAN?

Answer 32

Wide area network Spans a large area, city, state, or nation Connects non physically attatched computers. Most expensive

Question 33

Peer to peer network

Answer 33

All computers are equal and all equally share information and work Maximum 10 computer

Question 34

Server based network

Answer 34

Server is centralized and controls the operations and information and storage. Ex: PACS to store and distribute information

Question 35

Client-based network

Answer 35

Centralized computer controls the network, but the server processes the resource as requested by the client and returns only the results back to the client. (Lessens load)

Question 36

Server vs thin client vs thick client

Answer 36

Server = computer managing resources for other computers Thin client = device requests service be done; any computer Thick client = computer working independantly and managing its own files and can share its work and resources

Question 37

What is a coaxial cable

Answer 37

Wiring Center conductor wire surrounded by insulation and then a grounded sheild of braided wires. Sturdiest wire used

Question 38

What is a twisted pair wire

Answer 38

Four twisted pairs of copper wire insulated and bundled with RJ-45

Question 39

What is a fiber optic cable

Answer 39

Glass threads to transmit data. Fiber optic core wrapped in protective plastic

Question 40

What is a wireless connection

Answer 40

Uses radifrequencies between transmitters to communicate data. Has a limited range taking into account wall thickness and distance.

Question 41

What is a network bridge

Answer 41

The connection between segmented or broken up Networks. It is a physical wired connection

Question 42

What is a network router

Answer 42

The network router is a more sophisticated device. It helps with segmenting the network and organizing or directing messages to their correct location as they come through.

Question 43

What is Network protocol

Answer 43

The set of rules the data uses to travel along the Network Protocol is delivered in layers known as protocol stacks

Question 44

What are the layers of a network communication protocol stack. How many layers are there usually? Name the four basics

Answer 44

There are usually seven layers here are the four basics Layer 4: transport layer makes sure data packets are sequence correctly and do not contain errors Layer 3: Network layer breaks up the data into frames and decides which path the frame will take. Layer 2: The data link layer packages the data Layer 1: the physical layer consists of the networking media and physical components. This layer moves bits from one place to another

Question 45

What is topology

Answer 45

A physical or geometric layout of connected devices on a network

Question 46

What is the bus topology

Answer 46

A network where all devices are physically attached to and listen for communication on a singular wire all at the same time. ( like sitting on a bus all kids are sitting next to each other all in the same bus )

Question 47

What is ring topology

Answer 47

Ring topology is a network where all the devices are connected in a circle. Each device passes received messages to the next node until it reaches the location intended

Question 48

What is star topology

Answer 48

A Network that has the devices connected to a central Hub and then they are all individually connected to that Central hub. Data comes from the central Hub to the individual connected computers

Question 49

What is mesh topology

Answer 49

A Network that has multiple Pathways interconnecting devices and networks. It has redundancy built in with multiple connections.

Question 50

What type of topology is the internet based off

Answer 50

Mesh

Question 51

What is dicom stand for

Answer 51

Digital Imaging and Communications in medicine

Question 52

What is dicom

Answer 52

Dicom is the standard for exchanging medical images among networked medical devices. It is usually layered on top of tcp/ip.

Question 53

Name three reasons why dicom is better

Answer 53

It required strict contents of image header and pixel data so it's higher tech. It required tc/ip which allows devices to make use of commercial hardware and software It embraced open standard of development between vendors and users for standards

Question 54

Name three of the most common service classes seen in modalities and packs for dicom

Answer 54

Image storage, query or retrieval, print, modality work list, modality performed procedure, storage commitment, interchange media storage

Question 55

What is HL - 7

Answer 55

It is a accredited standards developing organization set for medical devices, insurance, imaging, and pharmacy. It oversees the standards of data and operates at many levels. Sort of like DICOM Generally it's used between the hospital information system and the Radiology information system (his and ris)

Question 56

What is his

Answer 56

Hospital information system that holds the patient's full medical information including billing and ordering

Question 57

What is RIS

Answer 57

Holds already specific patient data from scheduling to reports

Question 58

What is Pacs

Answer 58

Electronic reading room and file room (storage)

Question 59

what is a display workstation

Answer 59

any computer that a health care worker uss to view a digital image

Question 60

what is an archive server

Answer 60

the file room of PACS