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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.
State the Transmission of Visual Sensation This process takes place in the visual pathway from the retina to the visual cortex. 'The impulse originating in the retina travels a
The formation of macro and micronuclei of daughter paramoeci: Each exconjugant has a single micronucleus and four macronuclei. This type of exconjugant divides twice and f
PLACEN T A - Placenta is the intimate connection between the foehls and the uterine wall of the mother to exchange the materials. Placenta is a tempormy endocrine gland
SAFETY MEASURES IN THE ADMINISTRATION OF DRUGS It is essential to revise the five "Rights" before administration of medication to the paediatric group. These as you know are:
Enzymes are proteins that are catalysts of chemical reactions. From Chemistry, it is called that catalysts are non-consumable substances that decrease the activation energy essenti
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Explain the Precautions for Detection of Number of Bacteria in Milk? 1. Make a thin film of milk on the slide. 2. Do not over stain with methylene blue. If over staining ha
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Define methods of prevention and control of anaemia? The available methods of prevention and control of anaemia are: Supplementation Food fortification Dietary
Explain Subclavian Flap Aortoplasty ? Initial steps are same as for resection and end-to-end anastomosis. After exposing a the entire length of intra thoracic segment of left s
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