Magnification Imaging by Radiofrequency-Induced Nonlinear Phase Encoding

A new imaging technique is described which essentially stretches a predetermined region of interest in the object to be imaged by interacting linear magnetic field gradients with a series of radiofrequency magnifying pulses. These magnifying pulses progressively bend the phase of electromagnetic signals from the imaging focus during phase encoding. As a result, the differential phase evolution at the imaging focus is faster than in conventional MRI, leading to focal resolution enhancement. This technique is demonstrated by phantom and in vivo imaging.

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