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SPI EXAMINATION REVIEW FOR ULTRASOUND QUESTIONS AND ANSWERS 100% VERIFIED (UPDATE )
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SPI EXAMINATION REVIEW FOR ULTRASOUND QUESTIONS AND ANSWERS 100% VERIFIED (UPDATE )
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SPI EXAMINATION REVIEW FOR ULTRASOUNDQUESTIONS AND ANSWERS 100% VERIFIED
(UPDATE 2024-2025)
What type of wave is sound?
A. mechanical, transverse
B. mechanical, longitudinal
C. transverse, longitudinal
D. lateral wave - ANSWER B) mechanical, longitudinal
The frequency ranges for ultrasound are:
A. <20 Hz
B. 20 to 20,000 Hz
C. >20kHz
D. >2000 HZ - ANSWER C) ultrasound is defined as sound with a frequency
>20,000 Hz (20kHz)
The speed of sound in soft tissue is:
A. 1.54 mm/s
B. 1540 m/s
C. 1540 km/s
D. 1.54 m/μs - ANSWER B) sound travels through soft tissue at 1540 m/s
Which of the following transducers fires the elements in groups?
A. Linear sequenced array
,B. Phased array
C. Mechanical sector
D. Linear phased array - ANSWER A) The linear sequenced array fires the
elements in groups
The unit for wavelength is:
A. Millimeters
B. Hertz
C. Microseconds
D. Milliliters - ANSWER A) Wavelength is a distance, therefore the unit must be
a unit of distance such as millimeters
Enhancement is caused by:
A. Strongly reflecting structures
B. Propagation speed errors
C. Snell's law
D. Weakly attenuation structures - ANSWER D) Enhancement occurs when
sound passes through a weakly attenuating structure, such as a cyst
The wavelength in a material having a propagation speed of 1.5 mm/μs employing
a transducer frequency of 5.0 MHM is:
A. 0.3 mm
B. 0.3 cm
C. 0.6 mm
D. 3.0 mm - ANSWER A) Wavelength = c/f therefore, 1.5 mm/μs divided by
5MHZ = 0.3 mm
, An ultrasound transducer converts:
A. Electrical energy into light and heat
B. Electrical energy into mechanical energy
C. Mechanical energy into radiation
D. Sound into ultrasound - ANSWER B) Ultrasound transducers convert
mechanical energy into electrical energy and vice versa
Arrange the following media in the correct order from the lowest ATTENUATION to
highest.
A. Air, Fat, Muscle, Bone
B. Muscle, Fat, Air, Bone
C. Fat, Muscle, Bone, Air
D. Muscle, Air, Fat, Bone - ANSWER C) Fat, Muscle, Bone, Air
Air is the highest attenuator of ultrasound
Arrange the following media in terms of PROPAGATION SPEED, from lowest to
highest.
A. Air, Fat, Muscle, Bone
B. Muscle, Fat, Air, Bone
C. Bone, Muscle, Fat, Air
D. Muscle, Air, Fat, Bone - ANSWER A) Air, Fat, Muscle, Bone
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