ARDMS SPI STUDY GUIDE
FULLY SOLVED & UPDATED
2026-2027(LATEST VERSION
VERIFIED FOR ACCURACY) |
2026LATEST!!
In soft tissue, if the frequency of a wave is increased the Propagation
Speed (PS) will... - CORRECT ANSWER -Remain the Same
because stiffness and density affect Propagation Speed.
What is the audible range? - CORRECT ANSWER -20-20,000Hz
>20,000Hz=Ultrasound
Frequency is measured in - CORRECT ANSWER -Hertz (Hz)
,is
Cycles per Second
Not affected by sonographer
Increase Frequency; Decrease Depth
A period is the length of time it takes for - CORRECT ANSWER -
one complete wavelength to pass a fixed point
PRP is determined by - CORRECT ANSWER -Transmit time and
receive time.
Period is measured in - CORRECT ANSWER -Time (μs)
,When the sonographer changes the imaging depth what parameters
are changed? - CORRECT ANSWER -PRP, PRF, Duty Factor
What is duty factor? - CORRECT 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 - CORRECT ANSWER -1.54
mm/μs
(1540 m/sec)
Unit of measurement for Pulse Duration, Duty Factor, PRP, and
Period - CORRECT ANSWER -Time, (μs)
Pulse duration is determined by - CORRECT ANSWER -Sound
Source Only
, Pulse Duration is controlled by - CORRECT ANSWER -the
ultrasound system and transducer
Pulse Duration Formula - CORRECT ANSWER -pulse duration (μs)
= # cycles in pulse/frequency(MHz)
PD= Number of cycles in Pulse/ Frequency(Hz)
Spatial Pulse Length (SPL) (measurement) - CORRECT 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. - CORRECT
ANSWER -0.1 to 1.0 mm
FULLY SOLVED & UPDATED
2026-2027(LATEST VERSION
VERIFIED FOR ACCURACY) |
2026LATEST!!
In soft tissue, if the frequency of a wave is increased the Propagation
Speed (PS) will... - CORRECT ANSWER -Remain the Same
because stiffness and density affect Propagation Speed.
What is the audible range? - CORRECT ANSWER -20-20,000Hz
>20,000Hz=Ultrasound
Frequency is measured in - CORRECT ANSWER -Hertz (Hz)
,is
Cycles per Second
Not affected by sonographer
Increase Frequency; Decrease Depth
A period is the length of time it takes for - CORRECT ANSWER -
one complete wavelength to pass a fixed point
PRP is determined by - CORRECT ANSWER -Transmit time and
receive time.
Period is measured in - CORRECT ANSWER -Time (μs)
,When the sonographer changes the imaging depth what parameters
are changed? - CORRECT ANSWER -PRP, PRF, Duty Factor
What is duty factor? - CORRECT 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 - CORRECT ANSWER -1.54
mm/μs
(1540 m/sec)
Unit of measurement for Pulse Duration, Duty Factor, PRP, and
Period - CORRECT ANSWER -Time, (μs)
Pulse duration is determined by - CORRECT ANSWER -Sound
Source Only
, Pulse Duration is controlled by - CORRECT ANSWER -the
ultrasound system and transducer
Pulse Duration Formula - CORRECT ANSWER -pulse duration (μs)
= # cycles in pulse/frequency(MHz)
PD= Number of cycles in Pulse/ Frequency(Hz)
Spatial Pulse Length (SPL) (measurement) - CORRECT 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. - CORRECT
ANSWER -0.1 to 1.0 mm
