Nyquist limit, Biology

Assignment Help:

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.

438_NYQUIST LIMIT.png


Related Discussions:- Nyquist limit

Male reproductive disorders due to infections, Male reproductive disorders ...

Male reproductive disorders due to infections Septicemic infections have a greater affinity for vesicular glands than other regions of the reproductive tract viz. prostate, am

Pulmonary artery vary from pulmonary vein, In what two ways will the compos...

In what two ways will the composition of blood coming from the pulmonary artery vary from that going to the pulmonary vein? Blood in the pulmonary artery will have less oxygen

Sources of variability, Mutations and genetic recombination (in sexually re...

Mutations and genetic recombination (in sexually reproducing organisms) are major sources of variations in natural populations, In this section we will briefly mention the various

What are the intermediate hosts of plasmodium, What are the intermediate an...

What are the intermediate and the definitive hosts of the plasmodium? In the life cycle of the plasmodium humans are the middle hosts (where asexual reproduction takes place) a

What is the action mechanism of the antiretroviral drugs, What is the actio...

What is the action mechanism of the antiretroviral drugs called protease inhibitors which are used against HIV infection? Protease inhibitors are some of the antiretroviral dru

Drawbacks of free food items for diabetics patients, Drawbacks of Free Food...

Drawbacks of Free Food Items for diabetics patients In this context, it is important to note that a patient can have unlimited servings of 'free foods'. These are foods which d

Gene recombinations, Which of the recombination process(transformation, con...

Which of the recombination process(transformation, conjugation and transduction) would be most likely to occur in the natural environment?

What are muscle tissues, Q What are muscle tissues? How is the function of ...

Q What are muscle tissues? How is the function of this tissue related to the typical characteristics of its cells? Muscle tissues are that tissues which are made of cells able

What are the plant tropisms, What are the plant tropisms? Tropisms are ...

What are the plant tropisms? Tropisms are the movements that caused by external stimulus. In Botany the studied plant tropisms are phototropism (tropism in response to light),

Why does bark often break and die naturally, Why does bark often break and ...

Why does bark often break and die naturally? Bark is the mature periderm of the branches, stem and roots. It breaks and dies when these structures grow and thus the peridermal

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd