Pulse Echo

Question 0

changing values of continuously variable physical quantities

Answer 0

Analog

Question 1

Echoes returning from the body are weak from attenuation, treats all echoes equally.

Answer 1

Amplification

Question 2

Converts voltage amplitude to a number, suitable for computer memory

Answer 2

Analog to digital converter

Question 3

Determines focus, shape and steer of the beam for array transducers

Answer 3

Beam Former

Question 4

something that can rest in two states (flip flop in electronics)

Answer 4

Bistable

Question 5

basic unit of information in a computer and digital communication

Answer 5

Bit

Question 6

specialized vacuum tube in which images are produced when an electron beam strikes aphosphorescent surface.

Answer 6

Cathode-ray tube

Question 7

can improve the signal to noise ratio

Answer 7

Coded excitation

Question 8

increases amplification at varying depths (TGC, DGC)

Answer 8

Compensation

Question 9

decreases the difference between the largest and smallest voltages or echo amplitudes.

Answer 9

Compression

Question 10

The ability to distinguish between signal sizes

Answer 10

Contrast resolution

Question 11

Makes image suitable for display

Radio frequency converts to video form

Answer 11

Demodulation

Question 12

DGC- Compensates for sound beam attenuation due to different depths of the structure

Answer 12

Depth Gain Compensation

Question 13

converts processed image video data into analog signals suitable for TV video display

Answer 13

Digital to analog converter

Question 14

ratio of the largest to smallest amplitude or power that a system can handle

Answer 14

Dynamic range

Question 15

the number of sonographic images stored into memory per second

Answer 15

Frame rate

Question 16

Ratio of amplifier output to input electrical power

Answer 16

Gain

Question 17

range of shades of gray

Answer 17

Gray scale

Question 18

after echo data is aquired and converted to proper video format image frames are stored here

Answer 18

Image memory

Question 19

an electronic device that reformats echo data into image form

Answer 19

Image Processor

Question 20

averaging of sequential frames together to get a smoother image

Answer 20

Persistence

Question 21

Picture archiving and communications system

allows electronic images to be sent to work stations of site

Answer 21

PACs

Question 22

a single point in a graphic image

Answer 22

Pixel

Question 23

Image processing after the scan converter memory

Answer 23

Postprocessing

Question 24

image processing before the scan converter memory

Answer 24

Preprocessing

Question 25

Imaging with a rapid frame sequence display

Answer 25

Real-time

Question 26

A display that with a sufficient frame rate, appears to image moving structures or a changing scan plane continuously

Answer 26

Real-time display

Question 27

Temporarily stores images during scanning for viewing and recording

Answer 27

Scan converter

Question 28

An electronic device that manipulates electrical signals in preparation for appropriate presentation of information contained in them

Answer 28

signal processor

Question 29

averaging of frames that view anatomy from different angles

Answer 29

Spatial Compounding

Question 30

The ability to distinguish closly timed events as seperate events, and directly display rapidly moving structures

Answer 30

Temporal Resolution

Question 31

Increasing amplitudes at varying depth

Answer 31

Time Gain Compessation