frequency
D. four times the transmitted frequency
Answer:
C
Q: Which change would minimize the artifact observed in this image, assum- ing the pulse
repetition frequency is at its maximum limit?
A. adjust the sweep speed B. adjust the baseline C. increasing dynamic range
D. increasing the transmitted frequency
Answer:
B
Q: which parameter is most likely to affect spatial resolution? A. dynamic range
B. beam width C. system sensitivity D. depth of visualization
Answer:
D
Q: which imaging modality can provide the most accurate measurement of tumor volume?
A. color doppler
B. B-mode
C. A-mode
D. M-mode
Answer:
B
Q: according to ALARA (as low as reasonably achievable) guidelines, which parameter should
be minimized?
A. transmit power
B. frequency
Powered by https:\/\/learnexams.com\/search\/study?query=<\/a><\/p>\n\n\n\n
![\"\"](\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2023\/12\/ardms-spi-exam-questions-and-verified-answers-100-correct-grade-a-latest-2023-2024-update-725x1024.png\")
<\/a><\/figure>\n\n\n\nPhasic<\/a><\/p>\n\n\n\n Which term describes blood flow changes in response to respiration? Transducer crystals are damaged<\/a><\/p>\n\n\n\n What is demonstrated in this image produced by a linear array to placed on a uniform tissue-mimicking phantom? Aperture that increases with increasing focal length<\/a><\/p>\n\n\n\n What is dynamic aperture? Small acoustic impedance mismatch<\/a><\/p>\n\n\n\n Which variable can cause an acoustic shadow artifact? TGC<\/a><\/p>\n\n\n\n What control improved the effects of attenuation? Decreased penetration<\/a><\/p>\n\n\n\n What is the potential effect of increasing the PRF? By observing spaces between reflectors perpendicular to the beam<\/a><\/p>\n\n\n\n How is lateral resolution determined for a pulse-echo system using a tissue-mimicking test object? Transmit power<\/a><\/p>\n\n\n\n According to ALARA guidelines, which parameter should be minimized? Minimizes effect of attenuation artifacts<\/a><\/p>\n\n\n\n Which statement is most acurate regarding surface rendering 3D ultrasound imaging? Comet tail<\/a><\/p>\n\n\n\n Which artifact is indicated by the arrows in this image? B-mode<\/a><\/p>\n\n\n\n Which imaging modality can provide the most accurate measurement of tumor volume? Propagation speed<\/a><\/p>\n\n\n\n To which acoustic variable is penetration depth inversely related? 0 degrees<\/a><\/p>\n\n\n\n Which Doppler angle to flow results in the greatest absolute Doppler shift? Signal – to – noise ratio<\/a><\/p>\n\n\n\n What does coded excitation improve in addition to penetration? Color field of view<\/a><\/p>\n\n\n\n An increase in which parameter will improve the accuracy of velocity measurements with autocorrelation? Continuous wave<\/a><\/p>\n\n\n\n Which imaging mode requires a broadband transducer? Output power<\/a><\/p>\n\n\n\n Which ultrasound parameter directly affects an ultrasound beam’s intensity? Twice the transmitted frequency<\/a><\/p>\n\n\n\n With harmonic imaging, how does echo frequency relate to transmitted frequency? Ability to select sample depth<\/a><\/p>\n\n\n\n What is an advantage of using pulsed wave Doppler compared to continuous wave Doppler? Thickness<\/a><\/p>\n\n\n\n The center frequency of a transducer depends primarily upon which characteristic of the crystal? Speed of sound in tissue<\/a><\/p>\n\n\n\n Which factor limits image frame rate? Provides depth specificity<\/a><\/p>\n\n\n\n What is an advantage of using pulsed-wave Doppler versus continuous-wave Doppler? Adjusting the baseline<\/a><\/p>\n\n\n\n Which change would minimize the artifact observed in this image, assuming the pulse repetition frequency is at its maximum limit? Change in vessel direction<\/a><\/p>\n\n\n\n Which variable caused the color change from blue to red of the vessel in this image? Transducer aperture<\/a><\/p>\n\n\n\n What affects the beam width in the near field? Horizontal distance accuracy<\/a><\/p>\n\n\n\n Which parameter is target Group C evaluating based on this image? Spatial compounding<\/a><\/p>\n\n\n\n Which term describes the averaging together of scan lines from multiple angles to create one image? Difference between the transmitted ultrasound frequency and the received ultrasound frequency<\/a><\/p>\n\n\n\n What is the Doppler shift frequency? Depth of visualization<\/a><\/p>\n\n\n\n Which parameter is most likely to affect spatial resolution? Fat<\/a><\/p>\n\n\n\n When using a 5 MHz transducer, in which tissue is the ultrasound wavelength shortest? Decrease the color scale<\/a><\/p>\n\n\n\n How do you fix this? 180 degrees<\/a><\/p>\n\n\n\n Which angle of intonation to blood flow produces the max Doppler shift? Receiver dynamic range<\/a><\/p>\n\n\n\n Which variable is decreased when the number of acoustic lines per frame is increased without changing the max depth? Dynamic<\/a><\/p>\n\n\n\n When the focal point in a B-mode is electronically changed, which type of focusing is used? Left to right<\/a><\/p>\n\n\n\n Which way is the blood flowing? TGC<\/a><\/p>\n\n\n\n Which control allows adjustment for attenuation at specific depths? Reverberation<\/a><\/p>\n\n\n\n What is this artifact? A<\/a><\/p>\n\n\n\n Which represents the dead zone? A difference in tissue and propagation speeds<\/a><\/p>\n\n\n\n What condition must be present for refraction to occur? Resolution<\/a><\/p>\n\n\n\n Which setting of an ultrasound system gives the Sonographer the ability to display both strong and weak echoes? Surface rendering<\/a><\/p>\n\n\n\n Which technique results in a 3D image? Far field<\/a><\/p>\n\n\n\n In an unfocused transducer, which term defines the region between the transducer face and the point where the beam diverges? Edge enhancement<\/a><\/p>\n\n\n\n Which technique increases the sharpness of a high contrast boundaries? Thickness<\/a><\/p>\n\n\n\n What determines the center frequency of a transducer? Increased amplitude of the returning Doppler signals<\/a><\/p>\n\n\n\n Which of the following is a benefit of using contrast agents? Laminar<\/a><\/p>\n\n\n\n When a fluid is flowing at a slow and constant rate within a long tube having a uniform diameter, which is the nature of the flow? Aliasing<\/a><\/p>\n\n\n\n What is this image? 8 MHz<\/a><\/p>\n\n\n\n Which freq is best to evaluate structures lying 1 to 2 cm from the transducer? Propagation speed of the medium<\/a><\/p>\n\n\n\n Which factor determines the displayed depth of a reflector? Bone<\/a><\/p>\n\n\n\n A sound wave propagates fasted through which substance? Absorption<\/a><\/p>\n\n\n\n Which type of interaction between sound and tissue is most affected by the TI? Increasing the PRF<\/a><\/p>\n\n\n\n Which action can improve axial resolution of a displayed image? Defective transducer elements<\/a><\/p>\n\n\n\n What is the most common cause of localized vertical non-uniformity in real-time B-mode imaging? Reduces speckle<\/a><\/p>\n\n\n\n How does frequency compounding improve image quality? Source and receiver moving at the same speed and direction<\/a><\/p>\n\n\n\n Which scenario will produce no Doppler shift to the receiver? Increased Nyquist limit<\/a><\/p>\n\n\n\n Which factor reduces the likelihood of aliasing in a pulsed wave spectral Doppler? Coded excitation<\/a><\/p>\n\n\n\n Which technique utilizes modulation of the transmitted pulse to improve signal-to-noise ratio? Continuous wave Doppler<\/a><\/p>\n\n\n\n Which imaging mode requires 2 elements mounted side by side? 8 KHz<\/a><\/p>\n\n\n\n What is the nyquist limit if a pulsed wave Doppler instrument has a PRF of 16 KHz? Aliasing<\/a><\/p>\n\n\n\n
A. Phasic
B. Parabolic
C. Spontaneous
D. Pulsatile<\/a><\/p>\n\n\n\n
A. Time gain compensation not set properly.
B. System has low dynamic range.
C. Transducer crystals are damaged.
D. Focus control is malfunctioning.<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=100,onerror=redirect,w=120\/https:\/\/o.quizlet.com\/dTZ8b24C4yUXKzZkSUTb5A.jpg\")
<\/figure>\n\n\n\n
A. Aperture that varies with transmit frequency
B. Aperture that deceases as a function of time
C. Aperture that increases with increasing focal length
D. Aperture that changes as a function of frame rate<\/a><\/p>\n\n\n\n
A. Small acoustic impedance mismatch
B. Refraction
C. Perpendicular incidence
D. Low attenuation<\/a><\/p>\n\n\n\n
A. Dynamic range
B. Pulse Inversion
C. Multiple focal zones
D. TGC<\/a><\/p>\n\n\n\n
A. Depth ambiguity
B. Decreased frame rate
C. Poor spatial resolution
D. Decreased penetration<\/a><\/p>\n\n\n\n
A. By observing spaces between reflectors perpendicular to the beam
B. By observing 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<\/p>\n\n\n\n
A. Transmit power
B. Frequency
C. TGC
D. Overall gain<\/a><\/p>\n\n\n\n
A. Improves accuracy of volume measurement
B. Minimizes effect of attenuation artifacts
C. Spatial resolution improve when using high resolution mesh
D. Feature-based reconstruction store full 3D volume acquired<\/a><\/p>\n\n\n\n
A. Shadow produced by the diaphragm
B. Acoustic enhancement
C. Comet tail
D. Mirror image<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=100,onerror=redirect,w=120\/https:\/\/o.quizlet.com\/ca0H2o0kMEqfcAdrvsESfw.jpg\")
<\/figure>\n\n\n\n
A. Color Doppler
B. B-mode
C. A – mode
D. M-mode<\/a><\/p>\n\n\n\n
A. Frequency
B. Wavelength
C. Period
D. Propagation speed<\/a><\/p>\n\n\n\n
A. 0 degrees
B. 15 degrees
C. 45 degrees
D. 60 degrees<\/a><\/p>\n\n\n\n
A. Lateral resolution
B. signal – to – noise ratio
C. Frame rate
D. Dynamic range<\/a><\/p>\n\n\n\n
A. Color field of view
B. Packet size
C. Wall filter setting
D. Transmitted frequency<\/a><\/p>\n\n\n\n
A. Continuous wave
B. Doppler Pulsed wave
C. Doppler Color flow imaging
D. Harmonic imaging<\/a><\/p>\n\n\n\n
A. Time gain compensation
B. Operating frequency
C. Output power
D. Frame rate<\/a><\/p>\n\n\n\n
A. Half the transmitted frequency
B. Equal to the transmitted frequency
C. Twice the transmitted frequency
D. Four times the transmitted frequency<\/a><\/p>\n\n\n\n
A. Higher echo sensitivity
B. Ability to select sample depth
C. Decreased display of aliasing
D. Improved temporal resolution<\/a><\/p>\n\n\n\n
A. Width
B. Length
C. Spacing
D. Thickness<\/a><\/p>\n\n\n\n
A. Transducer operating frequency
B. Sample volume size
C. Speed of sound in tissue
D. Spatial pulse length<\/a><\/p>\n\n\n\n
A. Allows measurement of higher velocities
B. Increases range ambiguity
C. Reduces the potential for aliasing
D. Provides depth specificity<\/a><\/p>\n\n\n\n
A. Adjusting the sweep speed
B. Adjusting the baseline
C. Increasing the dynamic range
D. Increasing the transmitted frequency<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/xVMnGPPYdibX8pIIoy.nWg.jpg\")
<\/figure>\n\n\n\n
A. Change in vessel direction
B. Color scale set too low
C. Turbulent flow
D. Severe stenosis<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/DK.AnTtzGQvb33nhBjVTQA.jpg\")
<\/figure>\n\n\n\n
A. Pulse repetition frequency
B. Pulse duration
C. Frame rate
D. Transducer aperture<\/a><\/p>\n\n\n\n
A. Dead zone
B. Dynamic range
C. Axial resolution
D. Horizontal distance accuracy<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/xtZBpcBSR632yIvGKX8ejA.jpg\")
<\/figure>\n\n\n\n
A. Harmonic imaging
B. Real-time three-dimensional imaging
C. Elastography
D. Spatial compounding<\/a><\/p>\n\n\n\n
A. Received 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<\/p>\n\n\n\n
A. Dynamic range
B. Beam width
C. System sensitivity
D. Depth of visualization<\/a><\/p>\n\n\n\n
A. Fat
B. Blood
C. Bone
D. Muscle<\/a><\/p>\n\n\n\n
A. Decrease the color scale
B. Decrease the color packet size
C. Increase the color packet size
D. Increase the color scale<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/Dnrbrq6.eF3aqY-26q45iA.jpg\")
<\/figure>\n\n\n\n
A. 180 degrees
B. 150 degrees
C. 90 degrees
D. 45 degrees<\/a><\/p>\n\n\n\n
A. SPL
B. Frame rate
C. PRF
D. Receiver dynamic range<\/a><\/p>\n\n\n\n
A. Lens
B. Mechanical
C. Dynamic
D. Curved crystal<\/a><\/p>\n\n\n\n
A. Right to left
B. Left to right
C. Bidirectional
D. Cannot tell<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/PwH0zth6f5ewofvnCHdLkw.jpg\")
<\/figure>\n\n\n\n
A. TGC
B. Depth
C. Output power
D. Dynamic range<\/a><\/p>\n\n\n\n
A. Shadowing
B. Side lobe
C. Reverberation
D. Mirror image<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/eMgBUoPN-esBOuRifkiqOA.jpg\")
<\/figure>\n\n\n\n
A. A
B. B
C. C
D. D<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/dr5.EslLtr-y5sGnb.YY0A.jpg\")
<\/figure>\n\n\n\n
A. The presents of a strong specular reflector
B. The presents of several small reflectors
C. A difference in tissue and propagation speeds
D. A change in the angle of reflection<\/a><\/p>\n\n\n\n
A. Dynamic range
B. Resolution
C. Range calibration
D. Sensitivity<\/a><\/p>\n\n\n\n
A. Elastography
B. Harmonics
C. Spatial compounding
D. Surface rendering<\/a><\/p>\n\n\n\n
A. Side lobe
B. Focal zone
C. Near field
D. Far field<\/a><\/p>\n\n\n\n
A. Edge enhancement
B. Interpolation
C. Smoothing
D. Frame averaging<\/a><\/p>\n\n\n\n
A. Diameter
B. Shape
C. Matching layer
D. Thickness<\/a><\/p>\n\n\n\n
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 soft tissue
D. Frame rate is improved when interrogating contrast with power Doppler imaging<\/p>\n\n\n\n
A. Disturbed
B. Turbulent
C. Laminar
D. Pulsatile<\/a><\/p>\n\n\n\n
A. Wall filter saturation
B. Aliasing
C. Range ambiguity
D. Reversal of flow<\/a><\/p>\n\n\n\n![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/MyzkEZX5-FOI36Za3In2EA.jpg\")
<\/figure>\n\n\n\n
A. 2 MHz
B. 4 MHz
C. 6MHz
D. 8 MHz<\/a><\/p>\n\n\n\n
A. Transducer freq
B. Acoustic impedance
C. PRF
D. Propagation speed of the medium<\/a><\/p>\n\n\n\n
A. Bone
B. Muscle
C. Fat
D. Gas<\/a><\/p>\n\n\n\n
A. Reflection
B. Absorption
C. Scattering
D. Refraction<\/a><\/p>\n\n\n\n
A. Increasing the PRF
B. Reducing the receiver gain
C. Changing the gray scale map
D. Increasing the transducer frequency<\/a><\/p>\n\n\n\n
A. Improper TGC
B. Defective transducer elements
C. Faulty preamplifier
D. Malfunctioning scan converter<\/a><\/p>\n\n\n\n
A. Increases frame rate
B. Improves dynamic range
C. Reduces speckle
D. Reduces overall gain<\/a><\/p>\n\n\n\n
A. Source and receiver moving at the same speed and direction
B. Source moving to the receiver
C. Source moving away from the receiver
D. Receiver moving toward the source<\/a><\/p>\n\n\n\n
A. Increased sample volume depth
B. Increased freq
C. Increased velocity
D. Increased Nyquist limit<\/a><\/p>\n\n\n\n
A. Apodization
B. Panoramic imaging
C. Coded excitation
D. Spatial compounding<\/a><\/p>\n\n\n\n
A. M-mode
B. B-mode
C. Pulsed wave Doppler
D. Continuous wave Doppler<\/a><\/p>\n\n\n\n
A. 32 KHz
B. 10 KHz
C. 8 KHz
D. 5 KHz<\/a><\/p>\n\n\n\n
![\"Image:](\"https:\/\/quizlet.com\/cdn-cgi\/image\/f=auto,fit=cover,h=200,onerror=redirect,w=240\/https:\/\/o.quizlet.com\/mlZ4gIS9ufQ0UGNsMFtDdA.jpg\")
<\/figure>\n\n\n\n