Collage of multiple cross sections through a single apple. The apple has been virtually sliced down a vertical axis from the top to the bottom of the fruit, dividing it into left and right halves (sagittal plane). A series of sequential ultra-thin slices through the entire fruit were taken and selected slices from that series are shown here. These images were acquired by spin-echo magnetic resonance imaging (MRI) which reveals details inside the apple without damaging it. The images are digitally coloured where contrast corresponds to MRI signal intensity and hue was changed to match the natural colour of the fruit.