SPI MOCK EXAM
What is the best estimate of the distance that sound can travel in soft tissue in one
second?
- 1 yard
- 100 yards
- 1 mile
- 10 miles - ✔️✔️1 mile
Which of the following is NOT one of the physical processes that contributes to
attenuation of US waves passing through soft tissue?
- reflection
- redirection of sound in many directions
- focusing
- conversion of acoustic energy to heat - ✔️✔️focusing
What term describes the # of cycles that an acoustic variable completes in a second?
- period
- freq.
- PRP
- variable rate - ✔️✔️freq.
What happens to venous flow return to the HEART when a person INHALES? -
✔️✔️increases
What establishes the freq. of an US wave?
- transducer
- medium through which sound travels
- both
- neither - ✔️✔️transducer
Which of the following tasks is NOT performed by the receiver of an US sx?
- rectification
- smoothing
- compression
- degaussing - ✔️✔️degaussing
, Which of the following is NOT a potential mechanism for the production of bioeffects
from US exposure to the body?
- temp. elevation
- fractionation
- cavitation
- vibration - ✔️✔️fractionation
When the ELASTICITY of a medium is HIGH, the _____ is HIGH
- stiffness
- prop. speed
- compressibility
- reflectivity - ✔️✔️compressibility
According to AIUM, at which IN SITU tissue temp. is there danger to a fetus?
- 100 C
- 98.6 F
- 1 F over normal temp.
- 41 C - ✔️✔️41 C
2 sound pulses travel through the SAME medium. One wave's freq. is 2 MHz and the
other 10 MHz.
Which pulse has a LOWER PROP. SPEED?
- 10 MHz pulse
- 2 MHz pulse
- neither
- cannot be determined - ✔️✔️neither
What is the SMALLEST part of a DIGITAL picture called?
- bit
- byte
- pixel
- fractal - ✔️✔️pixel
SPL is _________ related to PD - ✔️✔️directly
AXIAL resolution is determined by
- mult. reflections
- beam width
- attenuation
What is the best estimate of the distance that sound can travel in soft tissue in one
second?
- 1 yard
- 100 yards
- 1 mile
- 10 miles - ✔️✔️1 mile
Which of the following is NOT one of the physical processes that contributes to
attenuation of US waves passing through soft tissue?
- reflection
- redirection of sound in many directions
- focusing
- conversion of acoustic energy to heat - ✔️✔️focusing
What term describes the # of cycles that an acoustic variable completes in a second?
- period
- freq.
- PRP
- variable rate - ✔️✔️freq.
What happens to venous flow return to the HEART when a person INHALES? -
✔️✔️increases
What establishes the freq. of an US wave?
- transducer
- medium through which sound travels
- both
- neither - ✔️✔️transducer
Which of the following tasks is NOT performed by the receiver of an US sx?
- rectification
- smoothing
- compression
- degaussing - ✔️✔️degaussing
, Which of the following is NOT a potential mechanism for the production of bioeffects
from US exposure to the body?
- temp. elevation
- fractionation
- cavitation
- vibration - ✔️✔️fractionation
When the ELASTICITY of a medium is HIGH, the _____ is HIGH
- stiffness
- prop. speed
- compressibility
- reflectivity - ✔️✔️compressibility
According to AIUM, at which IN SITU tissue temp. is there danger to a fetus?
- 100 C
- 98.6 F
- 1 F over normal temp.
- 41 C - ✔️✔️41 C
2 sound pulses travel through the SAME medium. One wave's freq. is 2 MHz and the
other 10 MHz.
Which pulse has a LOWER PROP. SPEED?
- 10 MHz pulse
- 2 MHz pulse
- neither
- cannot be determined - ✔️✔️neither
What is the SMALLEST part of a DIGITAL picture called?
- bit
- byte
- pixel
- fractal - ✔️✔️pixel
SPL is _________ related to PD - ✔️✔️directly
AXIAL resolution is determined by
- mult. reflections
- beam width
- attenuation
