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Potter-Bucky diaphragm used in radiology, England, 1940-1950

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Early X-ray plates were blurred due to the scattering of rays by body tissue. Radiologists Gustav Bucky (1880–1963) and Hollis E. Potter (1880-1964) worked independently on this problem from about 1913. A section of the resultant Bucky-Potter Diaphragm is shown. It was placed between the patient and the X-ray film. Parallel lead strips move across inside the wooden casing during an exposure. They block scattered rays travelling at other angles. The lead strips are not visible on the X-ray film because they are moving. The device was first marketed in 1921. It has become standard equipment on X-ray tables.

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    Glossary: x-rays

    A wave of electromagnetic radiation that has high energy and short wavelength. It is able to pass through many materials, except those of high density such as metals or bones. Discovered in 1895 by William Roentgen.

    Glossary: x-ray accessory

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