SPI PRACTICE (ARDMS A & B)
2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
What is a benefit of using contrast agents?
A) output power can be increased after contrast
administration to improve visualization
b) increased amplitude of the returning doppler signals
c) harmonic signals produced by contrast agents are
weaker than those produced by tissue
d) frame rate is improved when interrogating contrast with
power doppler
B
A sound wave propagates fastest through which
substance?
A) bone
b) muscle
c) fat
d) gas
A
When the focal point in a b-mode image is electronically
changed, which type of focusing is in use?
A) lens
b) mechanical
c) dynamic
d) curved crystal
C
,When a fluid is flowing at a slow and constant rate within a
long tube having a uniform diameter, what is the nature of
the flow?
A) disturbed
b) turbulent
c) laminar
d) pulsatile
C
What causes range ambiguity artifacts?
A) receiver overload
b) pulser overload
c) prf too high
d) prf too low
C
What is the round trip time in soft tissue for an echo from a
reflector at a depth of 1 cm?
A) 1.54 usec
b) 6.5 usec
c)13 usec
d) 26 usec
C
Which variable decreases when the number of acoustic
lines per frame is increased without changing its maximum
depth?
A) spl
b) frame rate
c) prf
d) receiver dynamic range
B
, Frequency compounding improves image quality by doing
what?
A) increasing frame rate
b) improving dynamic range
c) reducing speckle
d) reducing grading lobes
C
What is the most common cause of localized vertical
nonuniformity in a real-time b-mode image?
A) improper tgc
b) defective transducer elements
c) faulty preamplifier
d) malfunctioning scan converter
A
What is the cause of the black region in the center of the
vessel seen in this image?
A) aliasing
b) turbulence
c) incident angle
d) lack of blood flow at that location
C
What is increased if the pulse duration is decreased?
A) bandwidth
b) line density
c) frame rate
d) duty factor
C
What is the nyquist limit if a pulsed wave doppler
instrument has a pulse repetition frequency of 16 khz?
2026/2027 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
What is a benefit of using contrast agents?
A) output power can be increased after contrast
administration to improve visualization
b) increased amplitude of the returning doppler signals
c) harmonic signals produced by contrast agents are
weaker than those produced by tissue
d) frame rate is improved when interrogating contrast with
power doppler
B
A sound wave propagates fastest through which
substance?
A) bone
b) muscle
c) fat
d) gas
A
When the focal point in a b-mode image is electronically
changed, which type of focusing is in use?
A) lens
b) mechanical
c) dynamic
d) curved crystal
C
,When a fluid is flowing at a slow and constant rate within a
long tube having a uniform diameter, what is the nature of
the flow?
A) disturbed
b) turbulent
c) laminar
d) pulsatile
C
What causes range ambiguity artifacts?
A) receiver overload
b) pulser overload
c) prf too high
d) prf too low
C
What is the round trip time in soft tissue for an echo from a
reflector at a depth of 1 cm?
A) 1.54 usec
b) 6.5 usec
c)13 usec
d) 26 usec
C
Which variable decreases when the number of acoustic
lines per frame is increased without changing its maximum
depth?
A) spl
b) frame rate
c) prf
d) receiver dynamic range
B
, Frequency compounding improves image quality by doing
what?
A) increasing frame rate
b) improving dynamic range
c) reducing speckle
d) reducing grading lobes
C
What is the most common cause of localized vertical
nonuniformity in a real-time b-mode image?
A) improper tgc
b) defective transducer elements
c) faulty preamplifier
d) malfunctioning scan converter
A
What is the cause of the black region in the center of the
vessel seen in this image?
A) aliasing
b) turbulence
c) incident angle
d) lack of blood flow at that location
C
What is increased if the pulse duration is decreased?
A) bandwidth
b) line density
c) frame rate
d) duty factor
C
What is the nyquist limit if a pulsed wave doppler
instrument has a pulse repetition frequency of 16 khz?
