AND CORRECT VERIFIED ANSWERS BRAND NEW VERSION
Which parameter is decreased by the ultrasound machine to
evade the possibility of range ambiguity when the imaging depth
is increased?
a. Number of scan lines
b. Pulse repetition frequency (PRF)
c. Pulse repetition period (PRP)
d. Persistence - ANSWER-b. Pulse repetition frequency (PRF)
Which phrase does NOT describe an effect that focusing has on
the ultrasound beam?
a. A bigger focal zone
b. Enhanced near zone resolution
c. Diminished lateral resolution of the far zone
d. Results in a shorter near zone - ANSWER-a. A bigger focal zone
The amount of divergence that occurs in the far field is
determined by the
sound wave's frequency and which component?
a. Line density
b. Focal zone depth
c. Diameter of the crystal
d. Speed - ANSWER-c. Diameter of the crystal
,Select the type of transducer that produces an image that takes
on the shape of a parallelogram when it is electronically steered.
a. Linear phased array
b. Linear sequential array
c. Annular phased array
d. Convex array - ANSWER-b. Linear sequential array
Choose the type of transducer that lacks range resolution.
a. Phased array
b. Annular array
c. Continuous wave (CW)
d. Linear sequential array - ANSWER-c. Continuous wave (CW)
In this phased array transducer, what direction will the beam be
steered?
a. 45 degrees to the right
b. Slightly to the left
c. Slightly to the right
d. 45 degrees to the left - ANSWER-d. 45 degrees to the left
What configuration is necessary to focus the ultrasound wave in
a linear phased array transducer?
a. Electronic slope
b. Dynamic aperture
,c. PZT crystals
d. Electronic curve - ANSWER-d. Electronic curve
Select the answer that best describes how B-mode will typically
display blood vessels?
a. Hyperechoic
b. Isogenic
c. Anechoic
d. Heterogeneous - ANSWER-c. Anechoic
How deep is a reflector if the go-return time of a sound wave is
39 us?
a. 2cm
b. 3cm
c. 5cm
d. 6cm - ANSWER-b. 3cm
Why does grayscale imaging require the use of pulsed wave
ultrasound?
a. To optimize penetration
b. To optimize temporal resolution
c. To determine the bandwidth
d. To determine the depth of the reflector - ANSWER-d. To
determine the depth of the reflector
, Which system function is modified if the ultrasound user adjusts
the receiver gain?
a. Demodulation
b. Reject
c. Amplification
d. Compression - ANSWER-c. Amplification
When M-mode is employed during an echocardiogram, what
information is depicted on the display?
a. Depth and amplitude
b. Time and frequency
c. Amplitude, motion, and time
d. Depth, time, and frequency - ANSWER-c. Amplitude, motion, and
time
If an ultrasound image displays high contrast, what correlates
with the dynamic range?
a. Wide dynamic range
b. Narrow dynamic range
c. No effect on the range
d. A display of many shades of gray - ANSWER-b. Narrow dynamic
range
Which component of the ultrasound wave increases if the
sonographer
increases the output gain?