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ARDMS SPI STUDY GUIDE Exam Questions With Correct Answers

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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...

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  • October 15, 2024
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©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM



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... -

answer✔Remain the Same because stiffness and density affect Propagation Speed.


What is the audible range? - answer✔20-20,000Hz




>20,000Hz=Ultrasound


Frequency is measured in - answer✔Hertz (Hz)


is

Cycles per Second




Not affected by sonographer




Increase Frequency; Decrease Depth

, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM


A period is the length of time it takes for - answer✔one complete wavelength to pass a fixed

point


PRP is determined by - answer✔Transmit time and receive time.


Period is measured in - answer✔Time (μs)


When the sonographer changes the imaging depth what parameters are changed? - answer✔PRP,

PRF, Duty Factor


What is duty factor? - answer✔The percentage or fraction of time that the system is transmitting

a pulse (Time Sound is ON or ON-Time).


Propagation Speed in SOFT TISSUE - answer✔1.54 mm/μs


(1540 m/sec)


Unit of measurement for Pulse Duration, Duty Factor, PRP, and Period - answer✔Time, (μs)


Pulse duration is determined by - answer✔Sound Source Only


Pulse Duration is controlled by - answer✔the ultrasound system and transducer


Pulse Duration Formula - answer✔pulse duration (μs) = # cycles in pulse/frequency(MHz)




PD= Number of cycles in Pulse/ Frequency(Hz)

, ©SIRJOEL EXAM SOLUTIONS
12/3/2024 11:27AM


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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