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Cards In This Set
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ACOUSTIC ATTENUATION
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Reduction of amplitude/intensity of an acoustic signal as it propagates through a material.
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ACOUSTIC SHADOW
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Artifact; reduced echo lying beyond an attenuating object.
can be 'dirty' or 'clean'
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BLOOD APPEARS ____________ ON A SONOGRAPHIC IMAGE.
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Anechoic
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ARTIFACT
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Artificially created; false information created by reflections off materials
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ATTENUATION IS DUE TO THREE FACTORS. THEY ARE:
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Absorption, scattering, and beam divergence
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BEAM DIVERGENCE
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The continual widening of a sound beam as it travels
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BRUIT
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Sounds w/in the body associated with turbulent flow
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CALIPERS ARE USED TO MEASURE SUCH QUANTITIES AS:
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Time, frequency, velocity, and distance
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COLOR-FLOW DOPPLER INSONATES THE PATIENT AT ______ INTENSITY
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Maximum
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AN EXAMPLE OF A CONTRAST MEDIUM USED IN US PROCEDURES:
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Water (to fill stomach or bladder making nearby structures easier to detect)
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CONTRAST RESOLUTION
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Optimizes your image; ability of an us machine to distinguish a target from its surrounding background
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CONTROL SETTINGS INCLUDE:
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Power output control, focal zone control, image range control
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CORONAL PLANE DIVIDES THE BODY INTO ____________ & ___________
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Anterior & posterior
(front & back)
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COUPLING
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Forming of a path for the soundwave, from the transducer to the body
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CRYSTAL
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Piezoelectric element of the transducer
(made of crystalline materials like quartz and certain ceramics)
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