![]() ![]() This measurement is made in a collinear direction with the flow. In ultrasonic flow meter measurement, ToF is used to measure speed of signal propagation upstream and downstream of flow of a media, in order to estimate total flow velocity. In near-infrared spectroscopy, the ToF method is used to measure the media-dependent optical pathlength over a range of optical wavelengths, from which composition and properties of the media can be analyzed. The time-of-flight of electrons is used to measure their kinetic energy. Thus the time-of-flight is used to measure velocity, from which the mass-to-charge ratio can be determined. In time-of-flight mass spectrometry, ions are accelerated by an electrical field to the same kinetic energy with the velocity of the ion depending on the mass-to-charge ratio. ![]() It can be used in the detection of aneurysm, stenosis or dissection. In this method, blood entering the imaged area is not yet saturated, giving it a much higher signal when using short echo time and flow compensation. Magnetic resonance angiograph created by the ToF methodįor Magnetic Resonance Angiography (MRA), ToF is a major underlying method. ![]()
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