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The NYQUIST LIIMIT-It is a sampling phenomenon, which limits the maximum fiequemcy shift measurement to one half of the sampling frequency (PRF).
By its nature, pulse wave Doppler is a sampling system while continuous wave Doppler is not. The nyquist limit is a theoretical maximum frequency that a
If the frequency shift is higher than the Nyquist frequency, aliasing occurs; i.e., the Doppler spectrum is cut off the Nyquist frequency and the remaining frequency shift is recorded on the opposite side of baseline.
The PRF varies inversely with the depth of the sample volume the shallower the location of the sample volume, the higher the PRF and Nyquist frequency. In other words, higher velocities can be recorded without aliasing by pulse wave Doppler if the sample volume is closer to transducer.
Explain ZOE-Cements - materials for Root End Filling a. Two most widely accepted are: IRM and Super EBA (S-EBA) b. Both exhibit similar and favorable c. Clinically and
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Armamentarium 1. Denture duplicator or a modified plastic soapdish. (A plastic large soapdish with a base and cover can be adapted by drilling 2 mm holes interspersed and cover
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Assume that you have a stock solution of epinephrine at a concentration of 1mg/ml. Further assume that there are 20 drops/ml. a. Calculate the number of drops of the stock solution
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What conclusion you can draw about microorganisms that you saw under microscope from the plaque of your teeth?
Population Dispersal Population dispersal is the movement of individuals into or out of the population or the population area. It occurs in three following ways in a popu
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