关键词: 磁共振成像, 涡流, 预加重

Abstract:

Based on the Peripheral Component Interconnect (PCI) bus of a personal computer, a highly integrated gradient waveform generator used for nuclear magnetic resonance and magnetic resonance imaging was developed. Three independent gradient waveform channels on a printed circuit board were used as the sources for X, Y and Z gradients. The main feature of the design is utilization of field programmable gate array technology, making the hardware structure simpler and more flexible. In addition, digital preemphasis function was integrated in the gradient waveform generator and implemented in the field programmable gate array.

Key words: MRI, Eddy current, preemphasis, gradient, waveform