CT and MRI techniques image the body through cross sections, or slices, which can then be viewed singly or used to generate 3D images. Imaging in cross-sectional slices is called

Tomography produces images of the body in cross-sectional slices. CT and MRI can create these slices and use them to build 3D images, so the correct choice is tomography. Sonography and ultrasound use sound waves, while fluoroscopy shows moving X-ray images.

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