Pulsed field gradient (PFG) is a technique used in various areas of physics and chemistry, notably in magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR) spectroscopy. It involves the application of a gradient magnetic field to manipulate the behavior of magnetic spins in a sample. The key purpose of PFG is to encode spatial information into the magnetic resonance signal, enabling the mapping of molecular diffusion, flow dynamics, and other spatially-resolved phenomena.
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