Gradient Systems

This chapter discusses both major components of the gradient systems required by low-field MRI systems, namely the gradient driver and the gradient coil. It begins with the design of portable pulsed field gradient drivers that are lightweight and battery-powered. A practical implementation of such a gradient driver is shown to be capable of generating at least 3 A of current over a duration of at least 2 ms, which is sufficient for many portable low-field NMR/MRI systems. Next, the chapter discusses the design of gradient coils for both enclosed and single-sided systems.