RIU 324 Lecture Notes - Lecture 11: University Of Manchester, Reynolds Number, Viscosity
29 Mar 2020
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C- speed of interrogating beam through a medium. Cos of angle- mathematical correction for angle effect. Angle- insonification angle (or angle to flow) Of the following, which would increase the detected doppler shift. If angle decreases between 90 and 0, the cos of the angle increases and fdop increases. In the doppler equation, factors are known, determined, calculated. Angle= indicated by user (assumed to be 0 to 180 in cardiac) If the target is moving toward the detector, the wave fronts are compressed yielding a positive doppler shift. In color flow doppler, flash artifact can be caused by: high amplitude, low velocity changes such as motion from breathing. If a specific blood velocity for doppler shift is 2 khz, what would the. A negative doppler shift means- flow away from the transducer. Which scenario below would most likely produce much higher frequency shifts: 0 degree angle to flow, just distal to a severe stenosis,
