Diagram of the development of the internal hull-embryo gap in canola seed after the fluidized bed drying (FBD) treatment. (A) A single 2D micro-CT image of a canola seed before treatment, sh − seed hull and em − embryo. (B) A single 2D micro-CT image of the seed depicted in A after treatment, sh − seed hull, ag − airgap and em − embryo. (C) 3D render of the seed depicted in A. (D) 3D render of the seed depicted in A after treatment, where the developed airgap is highlighted in red. (E) 3D render with the hull set as transparent and showing in red the developed air volume in between the hull and the embryo. (F) 3D renders of each treatment showing in red the developed air volume produced by each preconditioning treatment. While the microwave and heat oven treatments produced air pockets only in a few locations, the FBD produced an airgap all around the seed.