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SPI-ARDMS| 2025 - 2026|ACTUAL EXAM QUESTIONS
AND CORRECT ANSWERS|GRADED A+
What is dynamic aperture? A.aperture that varies with transmit frequency b.aperture that decreases as a function of time C.aperture that increases with increasing focal length d.aperture that changes as a function of frame rate Which acoustic variable is penetration depth inversely related? a.frequency B.wavelength c.period d.propagation speed Which imaging mode requires a broadband transducer? A.continuous wave doppler B.pulsed wave doppler c.color flow imaging d.harmonic imaging What is the doppler shift frequency? A.recieved ultrasound frequency multiplied by the transmitted ultrasound frequency b.difference between the transmitted ultrasound frequency and the received ultrasound frequency C.sum of the transmitted and received ultrasound frequencies D.ratio of the transmitted ultrasound frequency to the received ultrasound frequency
What is the potential effect of increasing the pulse repetitionfrequency(prf)? A.depth ambiguity b.decreased frame rate c.poor spatial resolution d.decreased penetration What is an advantage of using pulsed wave doppler compared to continuous wave doppler? A. Higher echo sensitivity b.ability to select sample depth c.decreased display of aliasing d.improved temporal resolution D - answer what affects the beam width in the near field? A.pulse repetition frequency B. Pulse duration c.frame rate d.transducer aperture D - answer what is the advantage of using pulsed-wave doppler versus continuous-wave doppler? A.allows measurement of higher velocities b.increases range ambiguity C.reduces the potential for aliasing d.provides depth specificity D - answer which parameter is target group c evaluating based on the image?
A.fat b.blood c.bone d.muscle D - answer which term describes the averaging together of scan lines from multipleangles to create one image? A. Harmonic imaging b.realtime three dimensionalimaging c.elastography d.spatial compounding A - answer which variable can cause an acoustic shadow artifact? A.small acoustic impedance mismatch B. Refraction c.perpendicular incidence d.low attenuation B - answer what does coded excitation improve in addition to penetration? A.lateral resolution B.signal-to-noise ratio c.frame rate d.dynamic range A - answer how is lateral resolution determined for a pulsed-echo system using atissue- mimicking test object? A.by observing spaces between reflectors perpendicular to the beam b B yobserving spaces between reflectors along the beam path
C.by observing position of deepest visible reflector along the beam path D.by observing position of deepest visible reflector perpendicular to the beam path A - answer which variable caused the color change from blue to red of the vessel in this image? A. Change in vessel direction b.color scale set to low c.turbulent flow D.severe stenosis C - answer which artifact is indicated by the arrows in this image? A.shadow produced by the diaphragm B. Acoustic enhancement c.comet tail D.mirror image D - answer which control improves the effects of attenuation? A.dynamic range B.pulse inversion c.multiple focal zones d.time gain compensation A - answer which doppler angle to flow results in the greatest absolute doppler shift? A. degrees B.15 degrees c.45 degrees d.60 degrees
B. Beam width c.system sensitivity d.depth of visualization B - answer which imaging modality can provide the most accurate measurement oftumor volume? A.color doppler b.b-mode C.a-mode d.m-mode A - answer according to alara (as low as reasonably achievable) guidelines, which parameter should be minimized? A.transmit power b.frequency C.time gain compensation d.overall gain D - answer what is an advantage of using pulsed-wave doppler versus continuouswave doppler? A.allows measurement of higher velocities b.increases range ambigutiy C.reduces the potential for aliasing d.provides depth specificity C - answer what is demonstrated in this image produced by a linear array transducer placed on a uniform tissue-mimicking phantom?
A. Time gain compensation not set properly.B. System has low dynamic range. C. Transducer crystals are damaged.D. Focus control is malfunctioning. 3cm - answer what is the distance to the interface if the round trip time for a soundwave is 39 microseconds? Low frequency, low amplitude - answer which signals are eliminated by the wall filterin a spectral doppler display? Two images demonstrating the same pathology from different scan planes - answer at minimum, what is required when documenting a pathology discovered during an examination? Increased by 2 times - answer if the diameter of the sound beam is halved byfocusing, what happens to the intensity A - answer which parameter would change on a phantom test if the spatial pulse length were made longer? A. Axial resolution b. Lateral resolution C. Horizontal distance resignationd. Sensitivity B - answer if the ultrasound machine comes in contact with a patients body fluids,what should be done? A. Remove the machine from use for the day B. Use an approved disinfectant solution to clean itc.
B. 0.2 ms c. .5mc d. 5ms B - answer what limits diagnostic application at higher frequencies? A. Noise B. Tissue penetration c. Contrast resolution D. Temporal resolution
A - answer what is the function of a lens on a transducer? A. Focus the beam B. Increase the bandwidth c. Shorten the pulse lengthd. Provide damping D - answer what would improve axial resolution?A. Increase the pulse repetition frequency B. Reduce the receiver gain c. Change the gray scale map D. Increase the transducer frequency D - answer what is true of the far field?A. Sound beam converges B. Intensity is highest C. Lateral resolution is best d. Sound beam diverges A - answer what improves lateral resolution?A. Decreasing the beam width B. Increasing the pulse repetition frequencyc. Decreasing transmitted frequency D. Decreasing the width of the field of view B - answer which statement is true for a linear phased array transducer? A. Line density increases with depth B. Elements are all fired nearly simultaneouslyc.
Receiver moving toward source D - answer which mode requires two elements mounted side by side?A. Real time imaging B. Duplex imaging C. Pulsed wave doppler D. Continuous wave doppler C - answer when employing a tissue mimicking phantom, the depth at which echoesare no longer detected is an indicator of what? A. Dynamic range b. Lateral resolution c. Sensitivity D. Axial resolution A - answer what enhances the transmission of ultrasound energy between thetransducer and the skin? A. The transducer matching layer B. A lower pulse repetition frequency c. A lower frequency probe D. A narrow active probe aperture A - answer which technique increases the sharpness of high contrast boundaries? A) edge enhancement B) interpolation c) smoothing D) frame averaging
A - answer what is the most appropriate action for the sonographer to take when receiving a verbal order for an exam? A) deny performance of the exam until a written request is receivedb) seek approval from supervisor C) verbally repeat the request back to the referrer to verify correctnessd) document two forms of id of the patient A - answer which setting of an ultrasound system gives the sonographer the abilityto display both strong and week echoes? A) dynamic rangeb) resolution c) Range calibrationd) sensitivity B - answer 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 A - answer a sound wave propagates fastest through which substance? A) bone B) muscle c) fat D) gas
B - answer which variable decreases when the number of acoustic lines per frame isincreased without changing its maximum depth? a) Spl b) Frame rate c) prf D) receiver dynamic range C - answer frequency compounding improves image quality by doing what? A) increasing frame rate B) improving dynamic rangec) reducing speckle D) reducing grading lobes A - answer what is the most common cause of localized vertical nonuniformity in a real- time b-mode image? a) Improper tgc b) Defective transducer elementsc) faulty preamplifier D) malfunctioning scan converter C - answer what is the cause of the black region in the center of the vessel seen inthis image? a) Aliasing b) Turbulence c) Incident angle D) lack of blood flow at that location C - answer what is increased if the pulse duration is decreased? A)
bandwidth b) Line density c) frame rate d) duty factor C - answer what is the nyquist limit if a pulsed wave doppler instrument has a pulserepetition frequency of 16 khz? a) 32 khz b) 10 khz c) 8 khz d) 5 khz B - answer what caused the color pattern demonstrated in the artery indicated by thearrow in this image? a) Superimposed venous flowb) aliasing c) Flow reversal d) Color side lobe artifact D - answer which adjustment should be made to avoid the aliasing displayed on thisspectral doppler image seen on spectral analysis? A) reposition sample volume so it is deeper.B) decrease acoustic power c) Change the doppler angle from 60 to 45 degrees d) decrease the transducer freq C - answer if red blood cells are approaching a 5 mhz doppler transducer at a speedof 75 cm/s, what is the approximate received ultrasound frequency?
B. Side lobe C. Reverberation d. Mirror image D - answer how do you fix thisa. Decrease the color scale B. Decrease the color packet size c. Increase the color packet size d. Increase the color scale B - answer which way is the blood flowing?A. Right to left B. Left to right c. Bidirectionald. Cannot tell
