Neutron radiography is a non-destructive technique for photographing the interior structure of solid objects. While radiography conceptually similar to conventional X-ray radiography, neutrons are attenuated by many light elements including hydrogen, boron and lithium but penetrate heavier materials such as metals: this is a direct contrast to X-rays, which are absorbed by heavier elements but cannot detect many lighter elements. Neutron and X-ray radiography are therefore considered complementary techniques for the visualization of the interior structures.

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