What is dynamic aperture?
A.aperture that varies with transmit frequency
B.aperture that decreases as a function of time C
C.aperture that increases with increasing focal length
D.aperture that changes as a function of frame rate
to which acoustic variable is penetration depth inversely related?
A.frequency
B.wavelength A
C.period
D.propagation speed
which imaging mode requires a broadband transducer?
A.continuous wave doppler
B.Pulsed wave doppler B
C.color flow imaging
D.harmonic imaging
what is the doppler shift frequency?
A. recieved ultrasound frequency multiplied by the transmitted ultrasound frequency
B. ditterence between the transmitted ultrasound frequency and the received ultrasound
B
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 ettect of increasing the pulse repetition frequency(PRF)?
A.Depth ambiguity
B.Decreased frame rate A
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 B
C. decreased display of aliasing
D.improved temporal resolution
what attects the beam width in the near field?
A. Pulse repetition frequency
B. Pulse duration D
C. Frame rate
D.Transducer aperture
what is the advantage of using pulsed-wave doppler versus continuous-wave doppler?
A.allows measurement of higher velocities
B.increases range ambiguity D
C.reduces the potential for aliasing
D.provides depth specificity
which parameter is target group C evaluating based on the image?
A. dead zone
B. dynamic range D
C. axial resolution
D. Horizontal distance accuracy
, A
In this image, which target group is used to evaluate dead zone?
which ultrasound parameter directly attects an ultrasound beam's intensity?
A.TGC
B.operating frequency C
C.Output power
D.Frame rate
the center frequency of a transducer depends primarily upon which characteristics of the
crystal?
A.width
D
B.length
C.spacing
D.thickness
which factor limits image frame rate?
A.transducer operating frequency
B.Sample volume size C
C.Speed of sound in tissue
D.Spatial pulse length
when using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest?
A.fat
B.blood A
C.bone
D.muscle
which term describes the averaging together of scan lines from multiple angles to create one
image?
A.harmonic imaging
D
B.realtime three dimensional imaging
C.elastography
D.spatial compounding
which variable can cause an acoustic shadow artifact?
A.small acoustic impedance mismatch
B.refraction A
C.perpendicular incidence
D.low attenuation
A.aperture that varies with transmit frequency
B.aperture that decreases as a function of time C
C.aperture that increases with increasing focal length
D.aperture that changes as a function of frame rate
to which acoustic variable is penetration depth inversely related?
A.frequency
B.wavelength A
C.period
D.propagation speed
which imaging mode requires a broadband transducer?
A.continuous wave doppler
B.Pulsed wave doppler B
C.color flow imaging
D.harmonic imaging
what is the doppler shift frequency?
A. recieved ultrasound frequency multiplied by the transmitted ultrasound frequency
B. ditterence between the transmitted ultrasound frequency and the received ultrasound
B
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 ettect of increasing the pulse repetition frequency(PRF)?
A.Depth ambiguity
B.Decreased frame rate A
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 B
C. decreased display of aliasing
D.improved temporal resolution
what attects the beam width in the near field?
A. Pulse repetition frequency
B. Pulse duration D
C. Frame rate
D.Transducer aperture
what is the advantage of using pulsed-wave doppler versus continuous-wave doppler?
A.allows measurement of higher velocities
B.increases range ambiguity D
C.reduces the potential for aliasing
D.provides depth specificity
which parameter is target group C evaluating based on the image?
A. dead zone
B. dynamic range D
C. axial resolution
D. Horizontal distance accuracy
, A
In this image, which target group is used to evaluate dead zone?
which ultrasound parameter directly attects an ultrasound beam's intensity?
A.TGC
B.operating frequency C
C.Output power
D.Frame rate
the center frequency of a transducer depends primarily upon which characteristics of the
crystal?
A.width
D
B.length
C.spacing
D.thickness
which factor limits image frame rate?
A.transducer operating frequency
B.Sample volume size C
C.Speed of sound in tissue
D.Spatial pulse length
when using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest?
A.fat
B.blood A
C.bone
D.muscle
which term describes the averaging together of scan lines from multiple angles to create one
image?
A.harmonic imaging
D
B.realtime three dimensional imaging
C.elastography
D.spatial compounding
which variable can cause an acoustic shadow artifact?
A.small acoustic impedance mismatch
B.refraction A
C.perpendicular incidence
D.low attenuation
