a) TR for balanced SSFP (eg. True FISP or FIESTA) as a function of readout bandwidth for several isotropic voxel resolutions (0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 3.9mm) on a Siemens TIM Trio 3T MRI scanner. Where the body gradients could achieve 0.25mm isotropic resolution, the insert (or composite) gradients could achieve the same resolution with the TR of 0.5mm (or 0.75 mm) resolution. b) The relative improvements for insert (thin line) and composite gradients (thick line) for 0.25mm (solid) and 0.5mm (dashed) isotropic resolution respectively.