SPI Exam Real Questions With Correct Answers 2025
Terms in this set (95)
True T/F The PRF can be increased or decreased by the sonographer?
Refraction Rounding artifact (edge shadow) is mainly due to what?
To achieve better depth resolution you must have what?
A. Lower frequency
C. Shorter wavelengths B. Longer wavelengths
C. Shorter wavelengths
D. More cycles per pulse
What is this a photo of?
Lateral resolution
This is the ability to distinctly identify 2 structures that are very
lateral resolution
close together when they are side by side or perpendicular to
the beams main axis.
Later
al
LATA
Angul
ar
Transve
rse
Azimut
hal
the ability to accurately identify reflectors that are arranged
Axial Resolution
parallel to the ultrasound beam
False, SPL is fixed, you cannot T/F Axial resolution is adjustable?
change the Axial resolution
Longitudinal
Axial
LARRD Rang
e
Radi
al
Dept
h
, Shorter pulses What can improve axial resolution?
SPL The DISTANCE that a pulse occupies in space from the start to the end of a
pulse.
Source and medium What is the SPL determined by?
No Is SPL adjustable?
the actual time from the start of a pulse to the end of that pulse.
Pulse Duration
AKA talking or "on" time
Sound source, no What is PD determined by? Is it adjustable?
What is this a photo of?
Axial resolution
What is this a photo of?
Spatial Pulse Length
Directly related How are Pulse duration and period related?
Shorter duration pulses What type of pulses are desirable for imaging?
Longitudinal wave What type of wave is made by sound?
PRP The time from the start of one pulse to the start of the next pulse is
known as:
Sound source What determines the PRP?
True T/F PRP is adjustable
PRF the number of pulses that an ultrasound system transmits into the body
each second
Sound source What determines the PRF?
Yes Is the PRF adjustable?
Sound source, no What is frequency determined by and is it adjustable?
Sound source, no What is period determined by and is it adjustable?
Sound source, yes What is power determined by and is it adjustable?
Sound source, yes What is intensity determined by, and is it adjustable?
Wavelength The distance or length of one complete cycle is known as what?
What is wavelength determined by and can it be adjusted? (The
Source AND medium, no
only of the 7 parameters that has this)
Propagation speed is determined by what, and can it be
Medium, no
adjusted? (The only of the 7 parameters determined by this)
No, the Focus depth is not If you have two near identical systems emitting with a different PRF
dependent on PRP or PRF which system will have the farthest focus.
Terms in this set (95)
True T/F The PRF can be increased or decreased by the sonographer?
Refraction Rounding artifact (edge shadow) is mainly due to what?
To achieve better depth resolution you must have what?
A. Lower frequency
C. Shorter wavelengths B. Longer wavelengths
C. Shorter wavelengths
D. More cycles per pulse
What is this a photo of?
Lateral resolution
This is the ability to distinctly identify 2 structures that are very
lateral resolution
close together when they are side by side or perpendicular to
the beams main axis.
Later
al
LATA
Angul
ar
Transve
rse
Azimut
hal
the ability to accurately identify reflectors that are arranged
Axial Resolution
parallel to the ultrasound beam
False, SPL is fixed, you cannot T/F Axial resolution is adjustable?
change the Axial resolution
Longitudinal
Axial
LARRD Rang
e
Radi
al
Dept
h
, Shorter pulses What can improve axial resolution?
SPL The DISTANCE that a pulse occupies in space from the start to the end of a
pulse.
Source and medium What is the SPL determined by?
No Is SPL adjustable?
the actual time from the start of a pulse to the end of that pulse.
Pulse Duration
AKA talking or "on" time
Sound source, no What is PD determined by? Is it adjustable?
What is this a photo of?
Axial resolution
What is this a photo of?
Spatial Pulse Length
Directly related How are Pulse duration and period related?
Shorter duration pulses What type of pulses are desirable for imaging?
Longitudinal wave What type of wave is made by sound?
PRP The time from the start of one pulse to the start of the next pulse is
known as:
Sound source What determines the PRP?
True T/F PRP is adjustable
PRF the number of pulses that an ultrasound system transmits into the body
each second
Sound source What determines the PRF?
Yes Is the PRF adjustable?
Sound source, no What is frequency determined by and is it adjustable?
Sound source, no What is period determined by and is it adjustable?
Sound source, yes What is power determined by and is it adjustable?
Sound source, yes What is intensity determined by, and is it adjustable?
Wavelength The distance or length of one complete cycle is known as what?
What is wavelength determined by and can it be adjusted? (The
Source AND medium, no
only of the 7 parameters that has this)
Propagation speed is determined by what, and can it be
Medium, no
adjusted? (The only of the 7 parameters determined by this)
No, the Focus depth is not If you have two near identical systems emitting with a different PRF
dependent on PRP or PRF which system will have the farthest focus.
