Lecture 16

Question 1

Mechanical transducer has

Answer 1

Single element fixed with a motor

Question 2

Mechanical transducer sweeps

Answer 2

Back and foth and produces a sector image

Method is almost obsolete

Question 3

Automatic scanning aka

Answer 3

Electronic scanning

Question 4

Automatic scanning is

Answer 4

Live

Probe is constantly sending out pulses and receiving echoes

Building images even while you are holding still

Question 5

Automatic scanning is showing images in _____________

Answer 5

Sequence at so many frames per minute that it looks like a live scan rather than individual pictures

Question 6

There needs to be more than one ______ to do electronic scanning

Answer 6

Element

Question 7

Multiple elements =

Answer 7

An array (rectangular crystals, asembeled in rows)

Required for electronic scanning

Question 8

Single element is called a

Answer 8

Disk

Question 9

Linear array is

Answer 9

Several elements in a row

Question 10

The two ways to operate linear array

Answer 10

Sequencing and phasing

Question 11

Linear sequenced array usually called

Answer 11

Linear array

Question 12

Linear sequenced array involves

Answer 12

Firing groups of elements at the same time

Question 13

In Linear sequenced array ______ is apploed in groups

Answer 13

Voltage

Question 14

Each group of a Linear sequenced array acts like a

Answer 14

Single element

Question 15

What is the aperture of the Linear sequenced array

Answer 15

The width of the group

Question 16

Each group of Linear sequenced array will produce a _____ and recieve a ______ therefore each group will produce a ______

Answer 16

Pulse

Echo

Scan line of information

Question 17

Mulitple scan lines will produce

Answer 17

A rectangular image

Question 18

Width of the Linear sequenced array image =

Answer 18

Length of array

Question 19

Linear image consists of ___________ traveling _______

Answer 19

Parallel scan lines

Traveling in the same vertical direction

Question 20

LPF

Answer 20

Lines per frame

of scan lines in a frame

Question 21

Individual scan lines build up a

Answer 21

Frame

Question 22

Frame is stored in _____ and pulled out and displayed as _____

Answer 22

Memory

Image

Question 23

In sequencing scan lines come from

Answer 23

Element groups

Question 24

More LPF produces

Answer 24

Better images

Question 25

When fired in groups of 3-4 , it will produce ______ the scan lines

Answer 25

Double

Question 26

Convex/curvilinear array full name

Answer 26

Convex sequenced array

Question 27

Convex sequenced array operation is ______ to linear sequenced array

Answer 27

Identical

Question 28

Convex sequenced array produces

Answer 28

A modified sector exam