ARDMS SPI STUDY GUIDE Exam Questions With Correct Answers
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Course
Ardms abdomen
Institution
Ardms Abdomen
ARDMS SPI STUDY GUIDE Exam
Questions With Correct Answers
In soft tissue, if the frequency of a wave is increased the Propagation Speed (PS) will... -
answerRemain the Same because stiffness and density affect Propagation Speed.
What is the audible range? - answer20-20,000Hz
>20,000Hz=Ultra...
Spatial Pulse Length (SPL) (measurement) - answer✔The distance that a pulse occupies in space
from the start to the end of a pulse.
(mm)
Typical values for spatial pulse length in soft tissue. - answer✔0.1 to 1.0 mm
Spatial pulse length is determined by - answer✔sound source and medium
Spatial Pulse Length is directly proportional to - answer✔the Number of Cycles in the Pulse
and
the Wavelength
(Directly Proportional means that increased SPL will increase both the number of cycles in the
pulse and the wavelength if increased).
Spatial pulse length is inversely proportional to - answer✔Frequency (MHz)
(Inversely Proportional means that increased SPL will lower frequency. This is because axial
resolution is better with lower frequency)
Pulse Duration (PD) - answer✔The actual time from the start of a pulse to the end of that pulse; a
single transmit, talking, or "on" time.
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