Siyavula's open Physical Sciences Grade 12 textbook, chapter 6 on Doppler effect covering 6.2 The Doppler effect with sound
Name: Date: Doppler Effect Instructions: Read each question carefully. Choose the answer that best fits the question. Short answer response questions must be responded to in complete sentences. If the question involves calculations, you must show all your math work. Content Locked...
the Lindegaard ratio does not grade vasospasm, but helps differentiate between hyperemia (induced by medial or endovascular treatment) versus the onset of true vasospasm. If the Lindegaard ratio > 3, this would diagnose vasospasm, as increased flow velocity would be raised in the cerebral circulatio...
The technique is built on the principle of the Doppler effect, with measurement of the change in the frequency and wavelength of a sound wave transmitted and reflected by moving red blood cells within the vessel, termed as Doppler frequency shift.[9]Velocity is calculated using the Doppler formu...
The European Agency for the Evaluation of Medicinal Products (2004) Questions and answers on SonoVue. http://www.emea.eu.int/humandocs/Humans/EPAR/sonovue/list.htm. Ref Type: Data File Correas JM, Burns PN, Lai X, Qi X (2000) Infusion versus bolus of an ultrasound contrast agent: in...
This waveform distribution is inverted when patients are symptomatic according to the Fontaine scale, with a majority of waveforms being categorised as abnormal (p < 0.05, apart for grade III patients with the Spronk et al. classification) (Figure 3). 4. Discussion The results from the present...