MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Bone biopsy sample held in a pair of tweezers. It is about to be scanned with a computed tomography (CT) machine. Biopsies are tissue samples obtained for microscopic analysis to aid a diagnosis of the patient's condition. Photographed at the Rizzoli Institute, Bologna, Italy.
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