Chapter 12 & 13

Question 1

Mechanical transducer image shape

Answer 1

Triangular (sector)

Question 2

Mechanical transducer steering

Answer 2

Mechanical steering, with motor

Question 3

Mechanical transducer focusing

Answer 3

Fixed

Question 4

Mechanical transducer crystal

Answer 4

Single circular crystal

Question 5

Mechanical transducer crystal defect

Answer 5

Entire image is lost

Question 6

Annular phased array transducer image shape

Answer 6

Triangular , sector

Question 7

Annular phased transducer steering

Answer 7

Mechanical

Question 8

Annular phased array transducer focusing

Answer 8

Multiple focal zones, one for each crystal. Adjustable

Question 9

Annular phased array transducer crystal

Answer 9

Multiple ring shaped crystals with a common center.

Question 10

Annular phased array transducer crystal defect

Answer 10

Portion of the image is lost, horizontal band of side to side dropout

Question 11

Linear Phased array transducer image shape

Answer 11

Triangular

Question 12

Linear phased array transducer steering

Answer 12

Electronic. All crystals are fired one after the other

Question 13

Linear phased array transducer focusing

Answer 13

Electronic

Question 14

Linear phased array transducer crystal

Answer 14

100-300 rectangular crystals arranged side my side. Size of crystal is smaller than lineal sequential transducers

Question 15

Linear phased array crystal defect

Answer 15

Erratic beam steering and focus

Question 16

Linear sequential transducer image shape

Answer 16

Rectangular

Question 17

Linear sequential transducer steering

Answer 17

Electronic. Crystals are fired simultaneously

Question 18

Linear sequential transducer focusing

Answer 18

Old: curved crystal
New: electronic

Question 19

Linear sequential transducer crystal

Answer 19

120-500 rectangular shaped crystals arranged side by side. Crystals are larger than linear phased array transducer

Question 20

Linear sequential transducer crystal defect

Answer 20

Vertical line of dropout on picture

Question 21

Convex sequential transducer image shape

Answer 21

Blunted sector shape (what we see all the time)

Question 22

Convex sequential transducer steering

Answer 22

Electronic. Crystals are fired simultaneously

Question 23

Convex sequential transducer focusing

Answer 23

Electronic

Question 24

Convex sequential transducer crystal

Answer 24

120-250 rectangular crystals arranged side by side in a BOWED line

Question 25

Convex sequential transducer crystal defect

Answer 25

Only a portion of the image below the damaged crystal is affected

Question 26

Vector array transducer image shape

Answer 26

Trapezoid

Question 27

Vector array transducer steering

Answer 27

Electronic

Question 28

Vector array transducer focusing

Answer 28

Electronic

Question 29

Vector array transducer crystal

Answer 29

200 rectangular crystals

Question 30

Vector array transducer crystal defect

Answer 30

Erratic beam steering and focusing

Question 31

Define frame rate

Answer 31

System’s ability to create multiple frames each second (like a movie)

Question 32

Frame rate is determined by which two factors

Answer 32

Sound speed in a medium (fixed) and depth (adjusted by sonographer)

Question 33

The more frames per second, the better_____

Answer 33

Temporal resolution

Question 34

The more you add to your picture, the _______ your frame rate is gonna get

Answer 34

Slower

Question 35

Single focus equal _____ lateral resolution

Answer 35

Poorer

Question 36

Multiple focus equal _______ lateral resolution

Answer 36

Improved