2
Davies Physics SPI Questions with verified detailed answers
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- What can you do to enhance the visibility of a specular reflector?
|| || || || || || || || || || || ||
A) Scan w/ the lowest possible frequency
|| || || || || || ||
B) Scan w/ oblique incidence
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C) Scan w/ perpendicular incidence
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D) Increase distance to the reflector
|| || || || ||
E) Scan w/ an incident angle of 45 degrees - ✔✔C) Increase distance to the reflector
|| || || || || || || || || || || || || || ||
- Acoustic impedance increases w/ which of the following?
|| || || || || || || ||
A) Increased tissue density
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B) Increased propagation speed
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C) Increased transducer frequency
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D) A & B || || ||
E) All the above - ✔✔D) A & B
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|| A) Increased tissue density
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|| B) Increased propagation speed
|| || ||
- While performing a Doppler U/S examination, you adjust the pulse repetition frequency to
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12 kHz. This can also be expressed as:
|| || || || || || || ||
A) 0.12 Hz || ||
B) 1200 Hz|| ||
,2
C) 1.2 Hz || ||
D) 12,000 Hz
|| ||
E) 120 MHz - ✔✔D) 12,000 Hz
|| || || || || ||
- You are imaging a rounded mass w/ irregular borders. The mass has a much slower
|| || || || || || || || || || || || || || || ||
propagation speed than surrounding tissue. What sound-tissue interaction will be
|| || || || || || || || || ||
encountered as the U/S propagates through this interface? || || || || || || ||
A) Refraction
||
B) Reflection
||
C) Absorption
||
D) Scattering
||
E) All the above - ✔✔E) All the above
|| || || || || || || ||
|| A) Refraction
||
|| B) Reflection
||
|| C) Absorption
||
|| D) Scattering
||
- As a general observation about media in diagnostic sonography, sound propagates faster in
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materials w/ greater:
|| || ||
A) Compressibility
||
B) Acoustic Impedance
|| ||
C)Stiffness
D) Refractive Index
|| ||
E) All the above - ✔✔C) Stiffness
|| || || || || ||
, 2
- Which of the following terms denotes the time it takes for one cycle to occur?
|| || || || || || || || || || || || || || ||
A) Frequency
||
B) Amplitude
||
C) Wavelength
||
D) Period
||
E) Pressure - ✔✔D) Period
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- Which of the following would increase the spatial pulse length?
|| || || || || || || || || ||
A) Increased PRF
|| ||
B) Decreased # of transmit pulses per frame
|| || || || || || ||
C) Increased # of transmit pulses per second
|| || || || || || ||
D) Increased # of transmit pulses per line
|| || || || || || ||
E) Increased # of cycles per pulse - ✔✔E) Increased # of cycles per pulse
|| || || || || || || || || || || || || ||
- In order to display a structure on your sonographic image, the sound beam must be
|| || || || || || || || || || || || || || || ||
reflected at the interference. What is required for sound reflection at the interference of two
|| || || || || || || || || || || || || || ||
structures?
A) Oblique incidence at the interference boundary
|| || || || || ||
B) Temperature differences between the two media
|| || || || || ||
C) A difference in the acoustic impedance of the media
|| || || || || || || || ||
D) Different media diameters
|| || ||
E) Different attenuation coefficients - ✔✔C) A difference in the acoustic impedance of the
|| || || || || || || || || || || || || ||
media
Davies Physics SPI Questions with verified detailed answers
|| || || || || || ||
- What can you do to enhance the visibility of a specular reflector?
|| || || || || || || || || || || ||
A) Scan w/ the lowest possible frequency
|| || || || || || ||
B) Scan w/ oblique incidence
|| || || ||
C) Scan w/ perpendicular incidence
|| || || ||
D) Increase distance to the reflector
|| || || || ||
E) Scan w/ an incident angle of 45 degrees - ✔✔C) Increase distance to the reflector
|| || || || || || || || || || || || || || ||
- Acoustic impedance increases w/ which of the following?
|| || || || || || || ||
A) Increased tissue density
|| || ||
B) Increased propagation speed
|| || ||
C) Increased transducer frequency
|| || ||
D) A & B || || ||
E) All the above - ✔✔D) A & B
|| || || || || || || ||
|| A) Increased tissue density
|| || ||
|| B) Increased propagation speed
|| || ||
- While performing a Doppler U/S examination, you adjust the pulse repetition frequency to
|| || || || || || || || || || || || ||
12 kHz. This can also be expressed as:
|| || || || || || || ||
A) 0.12 Hz || ||
B) 1200 Hz|| ||
,2
C) 1.2 Hz || ||
D) 12,000 Hz
|| ||
E) 120 MHz - ✔✔D) 12,000 Hz
|| || || || || ||
- You are imaging a rounded mass w/ irregular borders. The mass has a much slower
|| || || || || || || || || || || || || || || ||
propagation speed than surrounding tissue. What sound-tissue interaction will be
|| || || || || || || || || ||
encountered as the U/S propagates through this interface? || || || || || || ||
A) Refraction
||
B) Reflection
||
C) Absorption
||
D) Scattering
||
E) All the above - ✔✔E) All the above
|| || || || || || || ||
|| A) Refraction
||
|| B) Reflection
||
|| C) Absorption
||
|| D) Scattering
||
- As a general observation about media in diagnostic sonography, sound propagates faster in
|| || || || || || || || || || || || ||
materials w/ greater:
|| || ||
A) Compressibility
||
B) Acoustic Impedance
|| ||
C)Stiffness
D) Refractive Index
|| ||
E) All the above - ✔✔C) Stiffness
|| || || || || ||
, 2
- Which of the following terms denotes the time it takes for one cycle to occur?
|| || || || || || || || || || || || || || ||
A) Frequency
||
B) Amplitude
||
C) Wavelength
||
D) Period
||
E) Pressure - ✔✔D) Period
|| || || ||
- Which of the following would increase the spatial pulse length?
|| || || || || || || || || ||
A) Increased PRF
|| ||
B) Decreased # of transmit pulses per frame
|| || || || || || ||
C) Increased # of transmit pulses per second
|| || || || || || ||
D) Increased # of transmit pulses per line
|| || || || || || ||
E) Increased # of cycles per pulse - ✔✔E) Increased # of cycles per pulse
|| || || || || || || || || || || || || ||
- In order to display a structure on your sonographic image, the sound beam must be
|| || || || || || || || || || || || || || || ||
reflected at the interference. What is required for sound reflection at the interference of two
|| || || || || || || || || || || || || || ||
structures?
A) Oblique incidence at the interference boundary
|| || || || || ||
B) Temperature differences between the two media
|| || || || || ||
C) A difference in the acoustic impedance of the media
|| || || || || || || || ||
D) Different media diameters
|| || ||
E) Different attenuation coefficients - ✔✔C) A difference in the acoustic impedance of the
|| || || || || || || || || || || || || ||
media
