SOLUTIONS FOR PRINCIPLES OF PHYSICS, EXTENDED,
INTERNATIONAL ADAPTATION, 12TH EDITION
HALLIDAY (ALL CHAPTERS INCLUDED)
Acoustic impedance increases with which of the following?
A) increased tissue density
B) increased propagation speed
C) increased transducer frequency
D) A and B
E) all the above - CORRECT ANSWER ✅✅✅D) A and B
What is the velocity of an ultrasound wave in bone?
A) 333 m/s
B) 8050 m/s
C) 1540 m/s
D) 4080 m/s
E) 1240 m/s - CORRECT ANSWER ✅✅✅4080 m/s
When the sound beam is refracted during a sonographic examination, which of
the follow might you detect on the ultrasound image?
A) axial misregistration
B) lateral misregistration
C) reverberations posterior to a reflector
,D) enhancement of a reflector
E) electrical interference - CORRECT ANSWER ✅✅✅B) lateral
misregistration
One MHz equals
A) 10 to the third Hz
B) 10 to the negative third Hz
C) 10 to the sixth Hz
D) 10 to the negative sixth Hz
E) 10 to the ninth Hz - CORRECT ANSWER ✅✅✅C) 10 to the sixth Hz
What system control should you adjust to compensate for sound attenuation
with increasing depth?
A: Dynamic range
B: TGC
C: Transmit power
D: Overall Receiver gain
E: Focus position - CORRECT ANSWER ✅✅✅B) TGC
Which of the following frequencies is considered to be ultrasound?
A) 2000 Hz
B) 20 Hz
C) 2 MHz
D) 200 Hz
E) 2 Hz - CORRECT ANSWER ✅✅✅C) 2 MHz
, Acoustic impedance:
A) is independent of the speed of sound
B) in inversely proportional to the density
C) is greater in gas than in metal
D) equals density times the propagation speed
E)is independent of the density - CORRECT ANSWER ✅✅✅D) equals
density times the propagation speed
Ultrasound propagation velocity depends on:
A: Amplitude and frequency
B: Impedance and attenuation
C: Density and compressibility
D: Dynamic range and compression
E: Impedance and density - CORRECT ANSWER ✅✅✅C) density and
compressibility
When you perform a Doppler exam, the frequency of the transmitted signal is
determined by
A) backing material
B) attenuation factor of the tissue
C) bandwidth
D) the frequency of the electrical signal applied to the transducer
E) amplitude - CORRECT ANSWER ✅✅✅D) the frequency of the electrical
signal applied to the transducer
INTERNATIONAL ADAPTATION, 12TH EDITION
HALLIDAY (ALL CHAPTERS INCLUDED)
Acoustic impedance increases with which of the following?
A) increased tissue density
B) increased propagation speed
C) increased transducer frequency
D) A and B
E) all the above - CORRECT ANSWER ✅✅✅D) A and B
What is the velocity of an ultrasound wave in bone?
A) 333 m/s
B) 8050 m/s
C) 1540 m/s
D) 4080 m/s
E) 1240 m/s - CORRECT ANSWER ✅✅✅4080 m/s
When the sound beam is refracted during a sonographic examination, which of
the follow might you detect on the ultrasound image?
A) axial misregistration
B) lateral misregistration
C) reverberations posterior to a reflector
,D) enhancement of a reflector
E) electrical interference - CORRECT ANSWER ✅✅✅B) lateral
misregistration
One MHz equals
A) 10 to the third Hz
B) 10 to the negative third Hz
C) 10 to the sixth Hz
D) 10 to the negative sixth Hz
E) 10 to the ninth Hz - CORRECT ANSWER ✅✅✅C) 10 to the sixth Hz
What system control should you adjust to compensate for sound attenuation
with increasing depth?
A: Dynamic range
B: TGC
C: Transmit power
D: Overall Receiver gain
E: Focus position - CORRECT ANSWER ✅✅✅B) TGC
Which of the following frequencies is considered to be ultrasound?
A) 2000 Hz
B) 20 Hz
C) 2 MHz
D) 200 Hz
E) 2 Hz - CORRECT ANSWER ✅✅✅C) 2 MHz
, Acoustic impedance:
A) is independent of the speed of sound
B) in inversely proportional to the density
C) is greater in gas than in metal
D) equals density times the propagation speed
E)is independent of the density - CORRECT ANSWER ✅✅✅D) equals
density times the propagation speed
Ultrasound propagation velocity depends on:
A: Amplitude and frequency
B: Impedance and attenuation
C: Density and compressibility
D: Dynamic range and compression
E: Impedance and density - CORRECT ANSWER ✅✅✅C) density and
compressibility
When you perform a Doppler exam, the frequency of the transmitted signal is
determined by
A) backing material
B) attenuation factor of the tissue
C) bandwidth
D) the frequency of the electrical signal applied to the transducer
E) amplitude - CORRECT ANSWER ✅✅✅D) the frequency of the electrical
signal applied to the transducer
