Exam Review Sonographic Principles and instrumentation Penny Questions and answers
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Sonography
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Sonography
Which is described as the ability of an object to resist compression and relates to the harness of a medium
a stiffness
b density
c pressure
d inertia
a Stiffness
An increase in PRF would lead to
a an increase in DF
b a decrease in PD
c an increase in the number of cycles
d decrease...
Exam Review Sonographic
Principles and instrumentation
Penny Questions and answers
Which is described as the ability of an object to resist compression
and relates to the harness of a medium
a stiffness
b density
c pressure
d inertia - answer a Stiffness
An increase in PRF would lead to
a an increase in DF
b a decrease in PD
c an increase in the number of cycles
d decrease in resolution - answer a an increase in DF
Which of the following would have the highest propagation speed
a air
b bone
c soft tissue
d water - answer b bone
As imaging depth increases, PRF must:
a not change
b increase
c decrease
,d PRF does not relate to PRF - answer b increase:
depth and PRF are INVERSELY related
Which describes the amount of refraction that occurs at an
interface?
a Bernoulli's law
b Poiseuille's law
c Law of reflection
d Snell's law - answer d Snell's Law
Which of the following would have the lowest propagation speed
a water
b soft tissue
c bone
d lung tissue - answer D lung tissue
Pressure is typically expressed in :
a. Frequency
b. Pascals
c. Decibels
d. Kilograms per centimeter cubed - answer b pascals
The typical range if frequency for diagnostic ultrasound imaging is:
a 20 - 20,000 Hz
b 1-20 MHz
c 2-15 kHz
d 12-100 Mhz - answer b 2-15 kHz
,The attenuation coefficient in soft tissue is equal to:
a 1/2 of the operating frequency
b double the operating frequency
c frequency x path length
d the total decibels - answer a 1/2 of the operating frequency
Micro denotes
a. Millionth
b. Hundredth
c. Million
d. Billionth - answer a. Millionth
Which of the following is described as the distance over which one
cycle occurs?
A PD
B DF
C period
D wavelength - answer D wavelength
Which of the following requires an oblique interface and
propagation speed mismatch?
A reflection
B refraction
C normal incidence
D dampening - answer B refraction
Areas of high pressure and density are referred to as:
A compressions
, B Rarefractions
C Diffractions
D Refractions - answer A Compressions
SPL can be calculated by:
A multiplying the number of cycles by the frequency
B dividing the period by the frequency
C multiplying the number of cycles by the wavelength
D Dividing the number of cycles by the wavelength - answer C
multiplying the number of cycles by the wavelength
Density is typically measured in:
A kilograms per centimeter cubed
B millimeters
C watts per square centimeter
D pascals - answer A. Kilograms per centimeter cubed
As a sound wave travels through the human body, the intensity of
the sound wave decreases as a result of:
A attenuation
B Elevational resolution
C Huygens principle
D refraction - answer A Attenuation
What is the total amount of attenuation that occurs if a 6.0 MHz
sound beam travels through 4 cm of soft tissue?
A 24 dB
B 12 dB
C 6dB
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