time of flight

[′tīm əv ′flīt] (mechanics) Elapsed time in seconds from the instant a projectile or other missile leaves a gun or launcher until the instant it strikes or bursts. (physics) The elapsed time from the instant a particle leaves a source to the instant it reaches a detector.

time of flight

the time for a photon created by annihilation of a positron-electron pair to reach a detector; because annihilation photons are created in pairs and travel in opposite directions at about 3 × 10¹⁰ cm/sec, measurement of the difference in arrival time at detectors with subnanosecond resolution allows calculation of the location of the event; the basic physics of positron emission tomography.

time of flight

An MRI term referring to a magnetic resonance angiography technique based solely on the flow of unsaturated blood into a magnetised presaturated slice. The difference between the unsaturated and presaturated spins creates a bright vascular image without needing contrast media.

time of flight

(tīm flīt) magnetic resonance imaging Rate of flow in a given time; causes some flowing nuclei to receive only one radiofrequency pulse and therefore produce a signal void.

单词	time of flight
释义	time of flight time of flight In artillery, mortar, and naval gunfire support, the time in seconds from the instant a weapon is fired, launched, or released from the delivery vehicle or weapons system to the instant it strikes or detonates. time of flight time of flight The time taken for light to travel a specified distance. time of flight [′tīm əv ′flīt] (mechanics) Elapsed time in seconds from the instant a projectile or other missile leaves a gun or launcher until the instant it strikes or bursts. (physics) The elapsed time from the instant a particle leaves a source to the instant it reaches a detector. time of flight time of flight the time for a photon created by annihilation of a positron-electron pair to reach a detector; because annihilation photons are created in pairs and travel in opposite directions at about 3 × 10¹⁰ cm/sec, measurement of the difference in arrival time at detectors with subnanosecond resolution allows calculation of the location of the event; the basic physics of positron emission tomography. time of flight An MRI term referring to a magnetic resonance angiography technique based solely on the flow of unsaturated blood into a magnetised presaturated slice. The difference between the unsaturated and presaturated spins creates a bright vascular image without needing contrast media. time of flight (tīm flīt) magnetic resonance imaging Rate of flow in a given time; causes some flowing nuclei to receive only one radiofrequency pulse and therefore produce a signal void. See TF See TOF
随便看	total military service to date total mission cost total mission life cycle cost total mixed ration total mobilization total modified direct costs total moisture content total molar buffer concentration total molecular surface area total monthly recurring charge total mortgage protection plan total motorcycle website total multi media inc. total mycophenolic acid total myocardial blood flow total necrosis totalness total network cost total network management total network management system total network operation plan total network test total neutralizing value total niche market domination total ninhydrin-positive substance