Unit 4 Digital Image Systems

Question 1

Basis of digital imaging has 2 computer processing methods

Answer 1

Analog and digital

Question 2

computers handle data composed of continuous signals (current)

Answer 2

analog

Question 3

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

Answer 3

digital

Question 4

photon stream- constant stream ADC

Answer 4

analog digital converter

Question 5

converts analog photon stream to digital information

Answer 5

ADC analog digital converter

Question 6

2 types of information from computer

Answer 6

operating instructions (program)
data (collected)

Question 7

instructions for calculations. alternative functions performed as variables are processed

Answer 7

software

Question 8

input and out put devices. physical components to the computer

Answer 8

hardware

Question 9

changing analog screen to digital. discrete density values

Answer 9

digital

Question 10

instructions

Answer 10

software program

Question 11

binary language

Answer 11

software program

Question 12

1 and 0

Answer 12

on and off

Question 13

1=

Answer 13

1

Question 14

2=

Answer 14

1,0

Question 15

3=

Answer 15

1,1

Question 16

4=

Answer 16

1,0,0

Question 17

binary number (binary digits)

Answer 17

BIT

Question 18

8 bit word

Answer 18

BYTE

Question 19

10 megabyte memory holds ___ bits of information

Answer 19

80,000,000

Question 20

central processing unit

Answer 20

CPU

Question 21

directs information to and from components within system

Answer 21

CPU central processing unit

Question 22

parallel or series connections between components

Answer 22

bus

Question 23

faster, simultaneous transmission, used in CT

Answer 23

parallel connections

Question 24

slower, information transferred in sequence

Answer 24

series

Question 25

specialized peripheral computer processing units

Answer 25

array processors

Question 26

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

Answer 26

array processors

Question 27

useful for repetitive calculations such as CT, MRI

Answer 27

array processors

Question 28

extracts information without alteration

Answer 28

read memory

Question 29

replaces old memory with new information

Answer 29

write memory

Question 30

read only memory

Answer 30

ROM

Question 31

random access memory

Answer 31

RAM

Question 32

basic operating instructions

Answer 32

ROM

Question 33

temporary storage of information during usage

Answer 33

RAM

Question 34

CD DVD disk

Answer 34

memory storage

Question 35

keyboard mouse scanner barcode reader joystick/controllers

Answer 35

input devices

Question 36

CRT monitor printers/ laser film recording systems

Answer 36

output devices

Question 37

memory store, input devices, output devices

Answer 37

peripheral devices

Question 38

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

Answer 38

Fourier Transmission

Question 39

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

Answer 39

fourier transmission

Question 40

set of instructions

Answer 40

algorithum

Question 41

kodak

Answer 41

best printers

Question 42

made sure they were all universal to every system

Answer 42

DICOM standard

Question 43

digital imaging and communication in medicine standard (compatibility)

Answer 43

DICOM standard

Question 44

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

Answer 44

DICOM standard

Question 45

output devices (laser printer, monitors)

Answer 45

DICOM 1

Question 46

input and output devices

Answer 46

DICOM 2

Question 47

picture archival communication systems

Answer 47

PACS

Question 48

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

Answer 48

PACS

Question 49

store on a server and can pull up anytime anywhere

Answer 49

PACS

Question 50

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

Answer 50

night hawking thanks to PACS