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

What are synthetic auxins, What are synthetic auxins and what are their use...

What are synthetic auxins and what are their uses? Synthetic auxins, like indolebutyric acid (IBA) and naphthalenic acid (NAA) are substances same to IAA (a natural auxin) but

What is resistant starch, What is Resistant Starch? Well, RS is defined...

What is Resistant Starch? Well, RS is defined as the starch, which escapes enzymatic hydrolysis in the small intestine and passes to the colon where it is fermented by colonic

How would contrast single covalent bonds, 1. In modern blimps, the gas of c...

1. In modern blimps, the gas of choice used to inflate them is helium rather than hydrogen. Hydrogen would be lighter, but helium is safer. Compare and contrast the atomic structur

Define homocysteinemia, Possible mechanisms of increased risk are that hype...

Possible mechanisms of increased risk are that hyperhomocystinemia may impair release of nitric oxide form endothelial cells, stimulate proferation of atherogenic smooth muscle cel

Bacterial diseases-brucellosis, Brucellosis Brucellosis among cattle, ...

Brucellosis Brucellosis among cattle, buffaloes, sheep, goats, pigs produces heavy economic losses due to abortions in late pregnancy, infertility and reduction in productivit

Termination of rna, Transcription   continues   until a termination   serie...

Transcription   continues   until a termination   series   is reached.   The most common termination signal is a GC-rich region which is a palindrome, followed by an AT-rich sequen

Explain voriconazole, Explain Voriconazole It has a spectrum of activit...

Explain Voriconazole It has a spectrum of activity similar  to itraconazole but appears to be more active against Aspergillus spp. And some species of  Candida, containing  C.

Magnetic resonance image enhancement, Over the last three decades medical i...

Over the last three decades medical imaging has developed to be an important tool for medical condition diagnosis, treatment planning and surgery. The insight provided by informati

Determine the features of the nervous system of arthropods, What are the no...

What are the noteworthy features of the nervous system of arthropods? In arthropods the nervous system has more complicated sensory receptors with well-advanced cephalization.

Define information required for management of emergencies, Define Informati...

Define Information Required for Management of Emergencies? Management or intervention needs accurate information about the actual situation and includes many non-nutritional co

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