The toroidal inductor was scanned using a TUX-3200 Tohken Co.,Ltd. CT x-ray inspection machine, at a resolution of 17µm. The images were imported into ScanIP where the core and wire segmented and reconstructed. In addition, the image was padded to generate an appropriate air boundary for the later analysis. The size of the air region was configured by considering the leakage flux. In cases where magnetic flux has wide leakage it is necessary to expand the air region sufficiently. The wire was then artificially extended to the boundary, through this added layer of air.