CCI Adult Echo CTL Physics of Ultrasound 16% (COMPLETE SOLUTION)

CCI Adult Echo CTL Physics of Ultrasound 16% (COMPLETE SOLUTION) A highly attenuating structure inhibits the transmission of sound which produces an anechoic area, posterior to the structure known as - ✔✔Shadowi ng Increasing sector size increases the - ✔✔Number of pulses needed to create the image Increasing sector size will decrease the - ✔✔Frame rate and temporal resolution Spatial resolution will improve with - ✔✔Increased line density ________________ res olution is the ability to differentiate two reflectors that are perpendicular to the US beam - ✔✔Lateral ___________________ resolution is the ability to differentiate two reflectors that are parallel to the US beam - ✔✔Axial __________________ and _____ ___________ are weak off axis portion of the beam that decrease lateral resolution - ✔✔Grating lobes and side lobes Grating lobes are seen with ______________ and side lobes are seen with _____________________ probes - ✔✔Arrays and single element ________________ increases or decreases the brightness of the echoes displayed - ✔✔Overall gain The amount of _______________ or ______________ is related to the beam intensity which is not affected by the overall gain control - ✔✔Reflection or attenuatio n _________________ can be reduced by decreasing Doppler gain, increasing wall filter settings, or trying another wall outlet - ✔✔Noise _________________ artifact causes the simultaneous display of two flow profiles - ✔✔Beam width artifact Smaller _____ _________ decrease beam width artifact - ✔✔Sample sizes _________________ resolution decreases the ability to demonstrate a moving structure over time - ✔✔Temporal Decreased _______________ resolution will cause the real -time image to appear to "drag" wi th a time difference between motion of the probe or the structure and the image displayed - ✔✔Temporal Larger ______________ have decreased temporal resolution because there is more data to process before color is displayed - ✔✔Sample sizes To reduce art ifactual _______________ of the contrast, reduce the MI setting, reduce the output power and/or move the focal zone to the level of the mitral valve or lower - ✔✔Swirling Injecting contrast at a faster rate can also improve the _____________ appearance, b ut this is not a system control adjustment - ✔✔Contrast The ______________ the structure you are imaging the longer the time the pulse needs to reach it and return - ✔✔Deeper Deeper structures have pulses that are emitted at a __________ rate because the y need to travel a longer distance - ✔✔Slower If the pulses are transmitted and received at a slower rate, the rate that the image is produced (frame rate) will also be - ✔✔Reduced