Chapter 12

Question 1

Loss of entire image

Answer 1

Mechanical

Question 2

Dropout of image information from the top to the bottom of the image. The location of the line corresponds to the broke crystal

Answer 2

Linear and Convex arrays

Question 3

Erratic steering and focusing. The extent to which the image is affected is variable

Answer 3

Phased arrays

Question 4

A horizontal or side-to-side band of dropout at a particular depth

Answer 4

Annular phased arrays

Question 5

Sector, mechanical, fixed, one and disc shape, image loss

Answer 5

Mechanical

Question 6

Rectangular electronic, electric, approx 200 rectangular, vert line dropout

Answer 6

Linear sequential, or switched

Question 7

Sector, electronic, electronic approx 200 rectangular, poor steering and focusing

Answer 7

linear phased array

Question 8

Sector, mechanical, electronic, 5 ring, horizontal line dropout

Answer 8

annular phased array

Question 9

always means adjustable or multi focus

Answer 9

phased array

Question 10

When a spike pattern is a straight line

Answer 10

Is an unfocused sound beam

Question 11

The sound beam is steered if the spike line has a?

Answer 11

Slope

Question 12

The sound beam is focused if the spike pattern is?

Answer 12

Curved

Question 13

Steering

Answer 13

Slope

Question 14

Transmit focusing

Answer 14

curvature

Question 15

Shame and number of active elements in the transducer

automatic redirection of the sound beams to create and image

Focusing of each sound beam

shape of two dimensional image

consequences of damaged or nonfuction active element in the probe

Answer 15

five characteristices of each transducer style

Question 16

Linear- Active elements are arranged in a straight line.
Annular- Elements are arranged as circular rings with a common center
Convex- Active elements are arranged in a bowed or arched line. The transducer may also be called a curved or curvilinear array.

Answer 16

3. Transducer arrays

Question 17

Used to make sound beam narrow over a greater range of depths and thus optimizes lateral resolution
-Change number of crystals, used to transmit pulse and receive

Answer 17

Dynamic apperture