Diagnostic Sonography

Medicine

Quiz 7 :

Imaging and Doppler Artifacts

Quiz 7 :

Imaging and Doppler Artifacts

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The best example of a mirror-image artifact is seen with the:
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D

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Which one of the following eliminates aliasing using the "cut and paste" technique?
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A

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The upper limit to the pulsed wave Doppler shift that can be properly detected by pulsed instruments is called:
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B

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Insufficient sampling during a Doppler study that results in the improper representation of information is known as:
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Artifacts caused by sonographic technique include all of the following except:
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The reduction in echo amplitude from reflectors that lie behind a strongly reflecting or attenuating structure is:
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Lack of axial and lateral resolution result in:
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Refraction can cause a reflector that is:
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Echoes resulting from grating lobes may be imaged if they fall within a(n) ___________ region.
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Which one of the following structures is most likely to demonstrate strong posterior shadowing?
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The artifact that shows structures that exist on one side of a strong reflector as being present on the other side as well is known as:
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Identify the artifact commonly seen with pulsed wave Doppler imaging.
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The strengthening of echoes from reflectors that lie behind a weak attenuating structure is:
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Which one of the following will reduce or eliminate aliasing?
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Which one of the following artifacts results from constructive and destructive interference of the returning echoes?
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Multiple reflections can occur between the transducer and a strong reflector. This is an example of:
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Which of the following solutions are common and convenient to aliasing?
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To decrease internally generated electronic noise in the Doppler signal, the sonographer should decrease the:
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Increased intensity in the focal region of the sound beam is called focal ___________________.
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Shadowing is reduced by using:
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