Ch. 1 Flashcards
Diagnostic ultrasound transducers generate a ________ of sound into the body.
a. wave
b. pulse
c. frequency
d. Doppler
b. pulse
The brightness of the dot corresponds to the ________ of the returning echo.
a. location
b. speed
c. strength
d. angle
c. strength
A rectangular image display is seen when using a ______ transducer.
a. sector
b. vector
c. convex
d. linear
d. linear
The location of each dot corresponds to the _______ of the echo to return.
a. strength
b. time
c. pulse
d. frequency
b. time
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
Sonographic images are composed of many _______.
a. crystals
b. scan lines
c. focal points
d. frequency shifts
b. scan lines
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
Doppler ultrasound measures the movement of _________.
a. tissue
b. blood
c. A and B
d. none of the above
c. A and B
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
The Doppler effect is a change in echo _______.
a. frequency
b. strength
c. amplitude
d. direction
a. frequency
Vertical parallel scan lines are seen with which transducer format?
a. vector
b. convex
c. linear
d. curvilinear
c. linear
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
A ______ scan is shaped like a slice of pie.
a. sector
b. convex
c. linear
d. curvilinear
a. sector
Sonography is medical anatomic imaging using a _____ technique.
a. starting point
b. pulse echo
c. vertical parallel
d. transducer instrument
b. pulse echo
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
