SPI version A

100問 • 1年前

Karla Alvarez

通報

問題一覧

which of the following is displayed with spectral Doppler but not with color Doppler

A) peak flow velocity

The cine function on the ultrasound system

B) is a type of post processing

What type of precautions is required for a patient with MRSA

D) contact precautions

____ is defined as the time from onset of systole to the peak systole occurs

A) acceleration time

if a renal Doppler exam demonstrates stenosis, but normal flow is identified on angiography evaluation the results are described as

C) false positive

increasing the number of bits per pixel in an image memory will improve the

C) contrast resolution

what changes occurred to the ultrasound beam when time pulses are emitted from left to right from the elements of the phased transducer

D) the beam is steered to the right

as a Doppler incident angle increases to 90° the detected Doppler shift varies and approaches what value

B) 0 kHz

multiply density of the tissue by propagation speed in the tissue will provide a value for what tissue characteristic

B) acoustic impedance

which of the following is a limitation of analog Doppler?

D) unable to detect post stenotic turbulence and spectral broadening

The acoustic impedance of the matching layer

C) is usually very low

____ is the predominant factor causing attenuation of the ultrasound beam and this can be counteracted by ____

A) sound absorption, increasing the TGC settings for the far field

Assuming line density is constant at two lines per degree and you change from a 90° sector to a 45° sector how many lines will now be produced

B) 90

which of the following is a limitation of power Doppler

C) has slower frame rates than color doppler

which of the following statements is true regarding the image produced by the transducer on the left?

D) the frame rate will be higher for the image

what color Doppler artifact is demonstrated on the image

A) flash

increasing the number of pulses in a color packet will

D) increase frame rate

according to the attached color map, what color would demonstrate for blood that is moving toward the probe at an average velocity of 100cm/s

B) white/ light blue

which of the following sound/ tissue interactions does not cause redirection of the incident wave

A) absorption

if two calcifications are located side-by-side in the liver with a 3 mm distance between them and a beam width of 6 mm how will the structure appear on the image?

A) as a single elongated horizontal reflection

tissue Doppler imaging uses ____ settings than PW doppler

D) lower filter

If the entire image is too dark, what console adjustment should you make first?

A) increase the overall gain

What should have been done to adjust and improve the color Doppler display on the image

A) decrease sample volume

which of the following will improve the lateral resolution on the image?

C) increase the focal zone number

Transesophageal and transvaginal transducers are considered ___ Devices that should be disinfected using ____

A) semi critical, high-level disinfectant

how is the pulse repetition period reduced in Doppler imaging

B) decrease imaging depth

Which of the following will maintain compliance with the ALARA principal

B) reducing the number of images taken in standard protocol

____ compares each reflected echo to the same echo from a previous ultrasound pulse to determine if motion is present

B) autocorrelation

if you increase the sector angle from 45 to 90°, and no other console changes are made what happens to the frame rate

B) it is reduced to 1/2 the original frame rate

which of the following system controls would increase the color display on the image

A) image threshold settings

which of the following transducers would be most useful for imaging deeper structures?

A) 3 MHz long focus

increasing ____ Will increase the ability of the system to display fine details on the image

C) pixel density

blood flow volume changes in the body are mainly controlled by what two factors

A) cardiac function and peripheral resistance

in a resting patient the highest resistance in the arterial system is in the

A) arterioles

The spatial pulse length is 4 mm. what is the minimum axial resolution?

B) 2 mm

resistance to blood flow is primarily controlled by

B) the radius of the vessel

if the peak systolic velocity is 3 m/s what is the peak pressure gradient?

B) 36 mmHg

What component of the beam former protects the sensitivity circuitry of the amplifier

B) transmit/ receive switch

which of the following will reduce color flash artifact

A) decrease color priority

what is the best way to reduce sliced thickness artifact that is causing false echoes in a superficial structure

A) use a standoff pad

what is the cause of the vertical acoustic shadow seen on both images?

A) element damage

how is detail resolution limit documented on phantom testing?

D) two separate pins are displayed as a single reflector on the image

The ___ of a wave multiplied by the number of cycles in the pulse will calculate the pulse duration (PD)

D) period

imaging an adult should never be performed with a thermal index level at or above ___ and imaging A fetus should never be performed with a thermal index level at or above ___

B) 6,3

while imaging the thyroid you increase the number of focal zones from 1 to 3. How will this affect the image?

A) degraded temporal resolution

when harmonic imaging is turned on a primarily improves ____ resolution

D) lateral

which of the following correctly describes how to avoid underestimation of peak velocity measurement on a faint Doppler wave form

D) increase the gain until speckle artifact is displayed across the screen, then reduce slightly

diagnostic ultrasound is described as frequencies greater than

B) 2 MHz

for an ultrasound system to produce a real time flicker free image the minimum frame rate required is

C) 15 Hz

which of the following can change the image data displayed on an archived exam on the ultrasound system

A) change the gray map used to create the image

review the image in the system, setting along the right side use your mouse and place over the setting that should be increased to improve the diagnostic quality of the color Doppler image

PRF & WF ( green )

which of the following will lead to more color displayed in real time in the abdominal aorta

C) increase frame rate

____ used to form the sector shaped field of view for a phased array transducer

D) electronic steering is

as the frequency of the wave doubles the wavelength ___

A) deceased by half

The more bits per pixel the __ shades of gray on the image and ____ improves

B) more, contrast resolution

if a 7 MHz wave is transmitted through the media listed below the shortest wavelength will be seen in the wave moving through ___

A) air

____ is defined as the range of frequencies contained in the U/S pulse

B) bandwidth

Which of the following is a primary factor in visualization of tissue boundaries that are not perpendicular to the incident beam such as tissue parenchyma and organ boundaries

B) backscatter

what type of transducer produce the image?

A) sector phased array

if the dynamic range is 64 dB and there are 32 shades of gray what is the contrast resolution?

C) 2 dB/shade

in the electronically focused ultrasound beam then intensity is

B) greatest at the focal point

Which of the following will be negatively affected by spatial compounding

A) temporal resolution

The ___ is defined as the time it take for one pulse to occur

B) pulse duration

what happens to the attenuation coefficient as the wave travels through soft tissue

A) remains constant

Aliasing artifact does not occur with CW Doppler systems because

D) CW doppler transducers used two separate elements so they are not limited by pulse echo parameters like PRF and Nyquist limit

when you adjust the Doppler PRF you adjust the ___ control on the system

D) velocity scale

activating harmonic imaging will result in ____

C) improved contrast resolution

which of the following ultrasound techniques has the highest temporal resolution

A) M-mode

which of the following describes the best way to improve the doppler tracing of the internal carotid artery

D) increase the cursor angle to 60°

what acoustic artifact is demonstrated on the image below

A) posterior shadowing

transducer can be electronically focused by

C) varying timing of the release of the pulses

the best obtainable angle of insonation for vascular evaluation that is most commonly used to provide Doppler shift information is ___ degrees

C) 60

which of the following is the best way to reduce the artifactual echoes on the image indicated by the red arrows

D) reduce TGC settings in the near field

what is the best way to increase beam penetration

A) decrease operating frequency

____ is the process that is performed in the beam former where the output voltage is better to decrease the formation of lobe artifacts

A) apodization

____ artifact is caused by the refraction and results in subtle image degradation

D) multipath

increasing the PRF will reduce the appearance of ___ while increasing the appearance of __ on Doppler evaluation

C) aliasing, range ambiguity

you are performing real time imaging of a vessel adjacent to the tibia what acoustic artifact Will most likely be identified on the 2-D image

B) posterior shadowing

Which of the following transducers uses a beam former

B) sector phased array

What setting should be increased to improve the diagnostic quality of color doppler image

PRF & WF

which of the following system adjustments would increase the size of the spectral window

D) changing from a 4mm to 2mm sample size

in order to assess low velocity flow which of the following operator adjustments should be made

D) decrease the rejection and wall filter setting

propagation speed, artifact reverberation artifact and the bayonet artifact are all acoustic artifacts seen with?

D) needles

which of the following is considered the capacitive component of the circulatory system

D) veins

____ artifact appears as multiple parallel equidistant lines that look like steps on the ladder

C) reverbation

which statement correctly describes a spectral wave form

D) the presence of a spectral window indicates laminar flow is present in the vessel being evaluated

which of the following is related to an increase in the spatial pulse length of an ultrasound beam produced by the transducer

B) decease in probe frequency

which of the following adjustments would improve the appearance of ultrasound enhancing agents on the image

C) decrease output power

how do the microbubbles in an ultrasound contrast agent change the image

A) increase the reflectivity of flowing blood

what is the proper method used to assess the size of the dead zone?

B) measure from the top of the image to the depth that uniform tissue is identified

diagnostic ultrasound is described as frequencies greater than

B) 2 MHz

which of the following describes the effect on the frame rate when changing from duplex to triplex imaging

C) decreased

Blood flow at a focal stenosis will demonstrate

B) increased resistance

what change in system controls can reduce the appearance of color displayed over vessel walls

A) decreasing color priority

what artifact is demonstrated on the ultrasound image by the red arrows?

D) posterior enhancement

what determines the frequency of a captivated micromachined ultrasound transducer

D) frequency of the drive voltage

the acoustic power is changed by -3dB the beam intensity ___

C) decreases by half

which of the pulses produced from a 7MHz transducer would have the best lateral and axial resolution

D) 2mm beam diameter, 3 pulses per cycle

when working in a hospital setting what is the best way to verify a patient’s identity

D) check the hospital issued ID bracelet

100

As the area of the beam increases _______

A) the intensity of the beam decreases

SPI version A pt 2

Karla Alvarez · 66問 · 1年前

SPI version A pt 2

66問 • 1年前

Karla Alvarez

SPI version B

Karla Alvarez · 100問 · 1年前

SPI version B

100問 • 1年前

Karla Alvarez

SPI version B pt 2

Karla Alvarez · 67問 · 1年前

SPI version B pt 2

67問 • 1年前

Karla Alvarez

SPI version C

Karla Alvarez · 100問 · 1年前

SPI version C

100問 • 1年前

Karla Alvarez

SPI version C pt 2

Karla Alvarez · 61問 · 1年前

SPI version C pt 2

61問 • 1年前

Karla Alvarez

SPI version D

Karla Alvarez · 100問 · 1年前

SPI version D

100問 • 1年前

Karla Alvarez

SPI version D pt 2

Karla Alvarez · 61問 · 1年前

SPI version D pt 2

61問 • 1年前

Karla Alvarez

ARDMS version A & B

Karla Alvarez · 77問 · 1年前

ARDMS version A & B

77問 • 1年前

Karla Alvarez

問題一覧

which of the following is displayed with spectral Doppler but not with color Doppler

A) peak flow velocity

The cine function on the ultrasound system

B) is a type of post processing

What type of precautions is required for a patient with MRSA

D) contact precautions

____ is defined as the time from onset of systole to the peak systole occurs

A) acceleration time

if a renal Doppler exam demonstrates stenosis, but normal flow is identified on angiography evaluation the results are described as

C) false positive

increasing the number of bits per pixel in an image memory will improve the

C) contrast resolution

what changes occurred to the ultrasound beam when time pulses are emitted from left to right from the elements of the phased transducer

D) the beam is steered to the right

as a Doppler incident angle increases to 90° the detected Doppler shift varies and approaches what value

B) 0 kHz

multiply density of the tissue by propagation speed in the tissue will provide a value for what tissue characteristic

B) acoustic impedance

which of the following is a limitation of analog Doppler?

D) unable to detect post stenotic turbulence and spectral broadening

The acoustic impedance of the matching layer

C) is usually very low

____ is the predominant factor causing attenuation of the ultrasound beam and this can be counteracted by ____

A) sound absorption, increasing the TGC settings for the far field

Assuming line density is constant at two lines per degree and you change from a 90° sector to a 45° sector how many lines will now be produced

B) 90

which of the following is a limitation of power Doppler

C) has slower frame rates than color doppler

which of the following statements is true regarding the image produced by the transducer on the left?

D) the frame rate will be higher for the image

what color Doppler artifact is demonstrated on the image

A) flash

increasing the number of pulses in a color packet will

D) increase frame rate

according to the attached color map, what color would demonstrate for blood that is moving toward the probe at an average velocity of 100cm/s

B) white/ light blue

which of the following sound/ tissue interactions does not cause redirection of the incident wave

A) absorption

if two calcifications are located side-by-side in the liver with a 3 mm distance between them and a beam width of 6 mm how will the structure appear on the image?

A) as a single elongated horizontal reflection

tissue Doppler imaging uses ____ settings than PW doppler

D) lower filter

If the entire image is too dark, what console adjustment should you make first?

A) increase the overall gain

What should have been done to adjust and improve the color Doppler display on the image

A) decrease sample volume

which of the following will improve the lateral resolution on the image?

C) increase the focal zone number

Transesophageal and transvaginal transducers are considered ___ Devices that should be disinfected using ____

A) semi critical, high-level disinfectant

how is the pulse repetition period reduced in Doppler imaging

B) decrease imaging depth

Which of the following will maintain compliance with the ALARA principal

B) reducing the number of images taken in standard protocol

____ compares each reflected echo to the same echo from a previous ultrasound pulse to determine if motion is present

B) autocorrelation

if you increase the sector angle from 45 to 90°, and no other console changes are made what happens to the frame rate

B) it is reduced to 1/2 the original frame rate

which of the following system controls would increase the color display on the image

A) image threshold settings

which of the following transducers would be most useful for imaging deeper structures?

A) 3 MHz long focus

increasing ____ Will increase the ability of the system to display fine details on the image

C) pixel density

blood flow volume changes in the body are mainly controlled by what two factors

A) cardiac function and peripheral resistance

in a resting patient the highest resistance in the arterial system is in the

A) arterioles

The spatial pulse length is 4 mm. what is the minimum axial resolution?

B) 2 mm

resistance to blood flow is primarily controlled by

B) the radius of the vessel

if the peak systolic velocity is 3 m/s what is the peak pressure gradient?

B) 36 mmHg

What component of the beam former protects the sensitivity circuitry of the amplifier

B) transmit/ receive switch

which of the following will reduce color flash artifact

A) decrease color priority

what is the best way to reduce sliced thickness artifact that is causing false echoes in a superficial structure

A) use a standoff pad

what is the cause of the vertical acoustic shadow seen on both images?

A) element damage

how is detail resolution limit documented on phantom testing?

D) two separate pins are displayed as a single reflector on the image

The ___ of a wave multiplied by the number of cycles in the pulse will calculate the pulse duration (PD)

D) period

imaging an adult should never be performed with a thermal index level at or above ___ and imaging A fetus should never be performed with a thermal index level at or above ___

B) 6,3

while imaging the thyroid you increase the number of focal zones from 1 to 3. How will this affect the image?

A) degraded temporal resolution

when harmonic imaging is turned on a primarily improves ____ resolution

D) lateral

which of the following correctly describes how to avoid underestimation of peak velocity measurement on a faint Doppler wave form

D) increase the gain until speckle artifact is displayed across the screen, then reduce slightly

diagnostic ultrasound is described as frequencies greater than

B) 2 MHz

for an ultrasound system to produce a real time flicker free image the minimum frame rate required is

C) 15 Hz

which of the following can change the image data displayed on an archived exam on the ultrasound system

A) change the gray map used to create the image

review the image in the system, setting along the right side use your mouse and place over the setting that should be increased to improve the diagnostic quality of the color Doppler image

PRF & WF ( green )

which of the following will lead to more color displayed in real time in the abdominal aorta

C) increase frame rate

____ used to form the sector shaped field of view for a phased array transducer

D) electronic steering is

as the frequency of the wave doubles the wavelength ___

A) deceased by half

The more bits per pixel the __ shades of gray on the image and ____ improves

B) more, contrast resolution

if a 7 MHz wave is transmitted through the media listed below the shortest wavelength will be seen in the wave moving through ___

A) air

____ is defined as the range of frequencies contained in the U/S pulse

B) bandwidth

Which of the following is a primary factor in visualization of tissue boundaries that are not perpendicular to the incident beam such as tissue parenchyma and organ boundaries

B) backscatter

what type of transducer produce the image?

A) sector phased array

if the dynamic range is 64 dB and there are 32 shades of gray what is the contrast resolution?

C) 2 dB/shade

in the electronically focused ultrasound beam then intensity is

B) greatest at the focal point

Which of the following will be negatively affected by spatial compounding

A) temporal resolution

The ___ is defined as the time it take for one pulse to occur

B) pulse duration

what happens to the attenuation coefficient as the wave travels through soft tissue

A) remains constant

Aliasing artifact does not occur with CW Doppler systems because

D) CW doppler transducers used two separate elements so they are not limited by pulse echo parameters like PRF and Nyquist limit

when you adjust the Doppler PRF you adjust the ___ control on the system

D) velocity scale

activating harmonic imaging will result in ____

C) improved contrast resolution

which of the following ultrasound techniques has the highest temporal resolution

A) M-mode

which of the following describes the best way to improve the doppler tracing of the internal carotid artery

D) increase the cursor angle to 60°

what acoustic artifact is demonstrated on the image below

A) posterior shadowing

transducer can be electronically focused by

C) varying timing of the release of the pulses

the best obtainable angle of insonation for vascular evaluation that is most commonly used to provide Doppler shift information is ___ degrees

C) 60

which of the following is the best way to reduce the artifactual echoes on the image indicated by the red arrows

D) reduce TGC settings in the near field

what is the best way to increase beam penetration

A) decrease operating frequency

____ is the process that is performed in the beam former where the output voltage is better to decrease the formation of lobe artifacts

A) apodization

____ artifact is caused by the refraction and results in subtle image degradation

D) multipath

increasing the PRF will reduce the appearance of ___ while increasing the appearance of __ on Doppler evaluation

C) aliasing, range ambiguity

you are performing real time imaging of a vessel adjacent to the tibia what acoustic artifact Will most likely be identified on the 2-D image

B) posterior shadowing

Which of the following transducers uses a beam former

B) sector phased array

What setting should be increased to improve the diagnostic quality of color doppler image

PRF & WF

which of the following system adjustments would increase the size of the spectral window

D) changing from a 4mm to 2mm sample size

in order to assess low velocity flow which of the following operator adjustments should be made

D) decrease the rejection and wall filter setting

propagation speed, artifact reverberation artifact and the bayonet artifact are all acoustic artifacts seen with?

D) needles

which of the following is considered the capacitive component of the circulatory system

D) veins

____ artifact appears as multiple parallel equidistant lines that look like steps on the ladder

C) reverbation

which statement correctly describes a spectral wave form

D) the presence of a spectral window indicates laminar flow is present in the vessel being evaluated

which of the following is related to an increase in the spatial pulse length of an ultrasound beam produced by the transducer

B) decease in probe frequency

which of the following adjustments would improve the appearance of ultrasound enhancing agents on the image

C) decrease output power

how do the microbubbles in an ultrasound contrast agent change the image

A) increase the reflectivity of flowing blood

what is the proper method used to assess the size of the dead zone?

B) measure from the top of the image to the depth that uniform tissue is identified

diagnostic ultrasound is described as frequencies greater than

B) 2 MHz

which of the following describes the effect on the frame rate when changing from duplex to triplex imaging

C) decreased

Blood flow at a focal stenosis will demonstrate

B) increased resistance

what change in system controls can reduce the appearance of color displayed over vessel walls

A) decreasing color priority

what artifact is demonstrated on the ultrasound image by the red arrows?

D) posterior enhancement

what determines the frequency of a captivated micromachined ultrasound transducer

D) frequency of the drive voltage

the acoustic power is changed by -3dB the beam intensity ___

C) decreases by half

which of the pulses produced from a 7MHz transducer would have the best lateral and axial resolution

D) 2mm beam diameter, 3 pulses per cycle

when working in a hospital setting what is the best way to verify a patient’s identity

D) check the hospital issued ID bracelet

100

As the area of the beam increases _______

A) the intensity of the beam decreases