Edelman Review Questions 2026 – Security Principles and Information
Systems Practice Study Guide
The AIUM suggest:
A. Do not perform studies without reason
B. Do not prolong Studies without reason
C. Minimize exposure time (but perform and complete diagnostic exam)
D. Use minimum output power and highest receiver gain required to produce optimal images
(ALARA Principle)
E. All of the above - correct answer ✔✔ All of the above
sound waves are:
A. electric
B. Mechanical, transverse
C. spectral
D. longitudinal, mechanical - correct answer ✔✔ longitudinal, mechanical
The speed of US in soft tissue is closest to:
A. 1,540 km/sec
B. 1.54 km/msec
C. 1,500 m/s
D. 1,540 mm/sec - correct answer ✔✔ 1,500 m/s
the frequency closest to the lower limit of US is:
A. 19,000 kHz
,B. 10,000 MHz
C. 20,000 msec
D. 15, 000 Hz - correct answer ✔✔ 15,000 Hz
which is not an acoustic variable?
A. density
B. pressure
C. distance
D. intensity - correct answer ✔✔ intensity
The effects of soft tissue on US are called:
a. acoustic proliferation properties
b. dynamic effects
c. acoustic propagation properties
d. biologic effects - correct answer ✔✔ acoustic propagation properties
All of the following are true EXCEPT
a. two waves with identical frequencies must interfere constructively
b. constructive interference is associated with waves that are in-phase
c. out-of-phase waves interfere destructively
d. waves of different frequencies may exhibit both constructive and destructive inference at
different times - correct answer ✔✔ two waves with identical frequencies must interfere
constructively
Put in decreasing order:
A. deca
,B. deci
C. micro
D. centi - correct answer ✔✔ deca
deci
centi
micro
______ is the time to complete one cycle
a. pulse duration
b. pulse period
c. period
d. duration period - correct answer ✔✔ period
which of the following sound wave is ultrasonic and least useful in diagnostic imaging?
a. 30 KHz
b. 8 MHz
c. 8,000 Hz
d. 3,000 kHz
e. 15 Hz - correct answer ✔✔ 30 KHz
what is the frequency of a wave with 1 msec period?
a. 10,000 Hz
b. 1,000 kHz
c. 1 kHz
d. 1 MHz - correct answer ✔✔ 1 kHz
, _________ is the distance covered by on cycle
a. pulse length
b. wavelength
c. cycle distance
d. cycle duration - correct answer ✔✔ wavelength
which of the following is determined by the source and medium?
a. frequency
b. period
c. propagation speed
d. range resolution - correct answer ✔✔ range resolution
propagation speed = __________ x wavelength
a. pulse duration
b. period
c. number of cycles in the pulse
d. frequency - correct answer ✔✔ frequency
As a result of ____ the propagation speed increases
a. increasing stiffness and increasing density
b. increasing stiffness and increasing elasticity
c. decreasing compressibility and decreasing density
d. decreasing stiffness and decreasing density - correct answer ✔✔ decreasing compressibility
and decreasing density
Put in decreasing order of propagation speed
Systems Practice Study Guide
The AIUM suggest:
A. Do not perform studies without reason
B. Do not prolong Studies without reason
C. Minimize exposure time (but perform and complete diagnostic exam)
D. Use minimum output power and highest receiver gain required to produce optimal images
(ALARA Principle)
E. All of the above - correct answer ✔✔ All of the above
sound waves are:
A. electric
B. Mechanical, transverse
C. spectral
D. longitudinal, mechanical - correct answer ✔✔ longitudinal, mechanical
The speed of US in soft tissue is closest to:
A. 1,540 km/sec
B. 1.54 km/msec
C. 1,500 m/s
D. 1,540 mm/sec - correct answer ✔✔ 1,500 m/s
the frequency closest to the lower limit of US is:
A. 19,000 kHz
,B. 10,000 MHz
C. 20,000 msec
D. 15, 000 Hz - correct answer ✔✔ 15,000 Hz
which is not an acoustic variable?
A. density
B. pressure
C. distance
D. intensity - correct answer ✔✔ intensity
The effects of soft tissue on US are called:
a. acoustic proliferation properties
b. dynamic effects
c. acoustic propagation properties
d. biologic effects - correct answer ✔✔ acoustic propagation properties
All of the following are true EXCEPT
a. two waves with identical frequencies must interfere constructively
b. constructive interference is associated with waves that are in-phase
c. out-of-phase waves interfere destructively
d. waves of different frequencies may exhibit both constructive and destructive inference at
different times - correct answer ✔✔ two waves with identical frequencies must interfere
constructively
Put in decreasing order:
A. deca
,B. deci
C. micro
D. centi - correct answer ✔✔ deca
deci
centi
micro
______ is the time to complete one cycle
a. pulse duration
b. pulse period
c. period
d. duration period - correct answer ✔✔ period
which of the following sound wave is ultrasonic and least useful in diagnostic imaging?
a. 30 KHz
b. 8 MHz
c. 8,000 Hz
d. 3,000 kHz
e. 15 Hz - correct answer ✔✔ 30 KHz
what is the frequency of a wave with 1 msec period?
a. 10,000 Hz
b. 1,000 kHz
c. 1 kHz
d. 1 MHz - correct answer ✔✔ 1 kHz
, _________ is the distance covered by on cycle
a. pulse length
b. wavelength
c. cycle distance
d. cycle duration - correct answer ✔✔ wavelength
which of the following is determined by the source and medium?
a. frequency
b. period
c. propagation speed
d. range resolution - correct answer ✔✔ range resolution
propagation speed = __________ x wavelength
a. pulse duration
b. period
c. number of cycles in the pulse
d. frequency - correct answer ✔✔ frequency
As a result of ____ the propagation speed increases
a. increasing stiffness and increasing density
b. increasing stiffness and increasing elasticity
c. decreasing compressibility and decreasing density
d. decreasing stiffness and decreasing density - correct answer ✔✔ decreasing compressibility
and decreasing density
Put in decreasing order of propagation speed
