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Flashcards in Ch. 1 Deck (15):
1

Diagnostic ultrasound transducers generate a ________ of sound into the body.
a. wave
b. pulse
c. frequency
d. Doppler

b. pulse

2

The brightness of the dot corresponds to the ________ of the returning echo.
a. location
b. speed
c. strength
d. angle

c. strength

3

A rectangular image display is seen when using a ______ transducer.
a. sector
b. vector
c. convex
d. linear

d. linear

4

The location of each dot corresponds to the _______ of the echo to return.
a. strength
b. time
c. pulse
d. frequency

b. time

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

a. sector

6

Sonographic images are composed of many _______.
a. crystals
b. scan lines
c. focal points
d. frequency shifts

b. scan lines

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

c. moving; frequencies

8

Doppler ultrasound measures the movement of _________.
a. tissue
b. blood
c. A and B
d. none of the above

c. A and B

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

d. spectral imaging

10

The Doppler effect is a change in echo _______.
a. frequency
b. strength
c. amplitude
d. direction

a. frequency

11

Vertical parallel scan lines are seen with which transducer format?
a. vector
b. convex
c. linear
d. curvilinear

c. linear

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

c. invisible object

13

A ______ scan is shaped like a slice of pie.
a. sector
b. convex
c. linear
d. curvilinear

a. sector

14

Sonography is medical anatomic imaging using a _____ technique.
a. starting point
b. pulse echo
c. vertical parallel
d. transducer instrument

b. pulse echo

15

Three-dimensional imaging requires many adjacent tissue _____ to build the image.
a. moving objects
b. frequency shifts
c. cross-sections
d. ultrasound pulses

c. cross-sections