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

Why is the cerebellum more developed in mammals, Why is the cerebellum more...

Why is the cerebellum more developed in mammals that jump or fly? The cerebellum is the major brain structure that coordinates the movement and the equilibrium of the body. For

Define partition chromatography - basic separation technique, Define Partit...

Define Partition chromatography - basic separation technique? It is a technique in which separation is achieved as a consequence of the relative solubility of a substance in th

Protozoa, locomotion in parameceum

locomotion in parameceum

Test tube baby, TEST TUBE BABY - Ova are fertilized in laboratory di...

TEST TUBE BABY - Ova are fertilized in laboratory dish (in vitra) containing a nutrient broth . It may be artificial insemination donor (AID) / Artificial insemination h

Maintenance therapy for leukemia, Maintenance Therapy A complete remis...

Maintenance Therapy A complete remission implies a clinical, haematological and bone marrow remission.  For remission therapy drugs like, methotrexate cyclophospharnide and 6-

How is the gymnosperm seeds formed, Q. How is the gymnosperm seeds formed? ...

Q. How is the gymnosperm seeds formed? What are the ploidies of the structures that compose the seeds? Their seeds are produced from differentiation of the megasporangia in the

What do you know zoological parks, Q. What do you know Zoological Parks? ...

Q. What do you know Zoological Parks? Zoological park has two faced aspects, the relationship between man and beast. There is awe and there is slaughter. There is worship and t

Define altered fat metabolism - nutrition during stress, Define Altered Fat...

Define Altered Fat Metabolism - Nutrition during Stress? Fat is the major fuel oxidized in infected patients. If nutrition support is inadequate, the peripheral fat stores are

Enumerate the history of neuropsychological, Enumerate the history of neuro...

Enumerate the history of neuropsychological The typical neuropsychological exam begins with a careful history taking. Areas of interest include: Medical history of patie

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