Ch. 1

Question 1

Diagnostic ultrasound transducers generate a ________ of sound into the body.

a. wave
b. pulse
c. frequency
d. Doppler

Answer 1

b. pulse

Question 2

The brightness of the dot corresponds to the ________ of the returning echo.

a. location
b. speed
c. strength
d. angle

Answer 2

c. strength

Question 3

A rectangular image display is seen when using a ______ transducer.

a. sector
b. vector
c. convex
d. linear

Answer 3

d. linear

Question 4

The location of each dot corresponds to the _______ of the echo to return.

a. strength
b. time
c. pulse
d. frequency

Answer 4

b. time

Question 5

The method by which each pulse originates from the same starting point is called a ______ image.

a. sector
b. linear
c. convex
d. none of the above

Answer 5

a. sector

Question 6

Sonographic images are composed of many _______.

a. crystals
b. scan lines
c. focal points
d. frequency shifts

Answer 6

b. scan lines

Question 7

Echoes produced by _______ objects have different ______ than the pulses sent into the body.

a. stationary; frequencies
b. stable; directions
c. moving; frequencies
d. moving; echoes

Answer 7

c. moving; frequencies

Question 8

Doppler ultrasound measures the movement of _________.

a. tissue
b. blood
c. A and B
d. none of the above

Answer 8

c. A and B

Question 9

Quantitative data are determined by which Doppler display?

a. color imaging
b. power imaging
c. B-mode (gray-scale, or brightness) imaging
d. Spectral imaging

Answer 9

d. spectral imaging

Question 10

The Doppler effect is a change in echo _______.

a. frequency
b. strength
c. amplitude
d. direction

Answer 10

a. frequency

Question 11

Vertical parallel scan lines are seen with which transducer format?

a. vector
b. convex
c. linear
d. curvilinear

Answer 11

c. linear

Question 12

A gray-scale ultrasound image is the visible counterpart of a/an ________.

a. frequency shift
b. spectral display
c. invisible object
d. electronic wave

Answer 12

c. invisible object

Question 13

A ______ scan is shaped like a slice of pie.

a. sector
b. convex
c. linear
d. curvilinear

Answer 13

a. sector

Question 14

Sonography is medical anatomic imaging using a _____ technique.

a. starting point
b. pulse echo
c. vertical parallel
d. transducer instrument

Answer 14

b. pulse echo

Question 15

Three-dimensional imaging requires many adjacent tissue _____ to build the image.

a. moving objects
b. frequency shifts
c. cross-sections
d. ultrasound pulses

Answer 15

c. cross-sections