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 do you know about tricuspid stenosis, Q. What do you know about Tricus...

Q. What do you know about Tricuspid stenosis? It is rare disease, with rheumatic etiology seen in 90 per cent of cases. In patients with rheumatic mitral stenosis only 3-5 per

Guidelines for diagnosis and treatment planning, Guidelines for diagnosis a...

Guidelines for diagnosis and treatment planning The diagnosis and planning the case is by far the most important step in the entire sequence of the treatment and due considerat

Hemoglobin, describe the mechanism of allosteric change.

describe the mechanism of allosteric change.

Nutrients and the soil, Nutrients and the Soil Early experiments on mi...

Nutrients and the Soil Early experiments on mineral uptake were performed by Hoagland, Stout and Amon in 1923. They showed that minerals were taken up from the soil primarily

Shock, S h o c k It is defined as a generalized acute reduction in ...

S h o c k It is defined as a generalized acute reduction in the perfusion of tissues by which there is oxygen deficiency in the cells. It is characterized by reduction in e

Give some examples of secretory cells?, Endocrine and exocrine pancreatic c...

Endocrine and exocrine pancreatic cells, thyroid and parathyroid endocrine cells, adenohypophysis, adrenal and pineal endocrine cells, the lot of types of gastric exocrine and endo

What are the parathyroids, Q. What are the parathyroids? Where are they loc...

Q. What are the parathyroids? Where are they located and what are the hormones secreted by these glands? The parathyroids are four small glands embedded two in each posterior f

Explain healthcare burden of heart diseases, Explain Healthcare Burden OF H...

Explain Healthcare Burden OF HEART DISEASES? CAD and its complications use up a substantial portion of the scarce healthcare resource of the country. It has been reported that

Why does not gene therapy cure cystic fibrosis, Why doesn't gene therapy cu...

Why doesn't gene therapy cure cystic fibrosis? Although a normal gene is introduced into a patient's surface cells in the lung, these cells are not the ones that require produc

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