Abstract
This paper reports on a gradient micro coils for MRI. The gradient micro coils was fabricated by assembling flexible Cu/polyimide substrate to 3D printed jig with complicated 3D structure. Since the micro coils have spatially high positional accuracy, our gradient micro coils has high gradient magnetic field efficiency with high linearity. The number of turns and gap of the coils were 4 turns, 10 mm. We took MRI images of the cooking oil and measured the efficiency of the gradient coils. The efficiency of X, Y and Z-axis gradient coils were 50.1, 51.5, and 50.1 mT/m/A. Since the gradient magnetic field efficiency was about 13 times stronger than the hand-winding coils, high resolution MRI image can be expected.
