Medical Physics International
نویسندگان
چکیده
Following the discovery of a “new kind of rays,” to be named by him as x-radiation, and others as Roentgen’s rays, Dr. Roentgen embarked on an intense investigation in a series of innovative experiments to determine its properties and characteristics and how it compared to other known radiations, specifically light and cathode rays. He demonstrated that the radiation produced fluorescence and exposed photographic plates. The revolutionary discovery was that it penetrated normally opaque objects and produced shadow images of things within. It was these characteristics alone that were the foundation of x-ray imaging that soon changed and enhanced the practice of medicine around the world. For additional experiments he developed a variety of test devices that continue to be used by physicists for evaluating the performance of x-ray equipment and devices. These included a pinhole camera, step wedge, and an innovative device to become known as a penetrameter. A major focus of his work was investigating the penetration of the radiation through a variety of objects and materials. He demonstrated, and often documented with photographic images, that penetration related to both characteristics of the material (thickness and density) and the x-ray beam itself (pressure within the tube, the associated electrical voltage, and filtration of the beam). Having observed the effect on electrical charges in the vicinity of the x-ray apparatus he developed a series of experiments to demonstrate the direct ionization in air. Within just a few months of intense research he discovered, evaluated, and documented virtually all of the properties and characteristics of x-radiation as we know them today. Keywords— Roentgen, x-rays, discovery, investigate, properties.
منابع مشابه
Proceedings of the First MEFOMP International Conference of Medical Physics: November 2-4, 2011, Shiraz, Iran
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