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RADD 2501 First Lecture - X­Ray Physics X­Ray Physics...

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Unformatted text preview: X­Ray Physics X­Ray Physics RADD 2501 X­rays…. Well, you see, this heterogeneous invisible beam has been passed through body tissues with different absorption characteristics in the region of clinical interest of your chiropractor, exciting crystals of rare earth salts contained in two screens between which is sandwiched a polyester film coated, on each side, with a thin layer of presensitized silver halide crystals. These activated crystals will be converted to metallic silver in the chemical processing of the film over a period of ninety seconds at 34.5 degrees Celsius or at about 94 degrees Fahrenheit. Energy/Wavelength Energy/Wavelength Absorption of x­ray: ionization Absorption of x­ray: ionization Radiographic vs. anatomic density Radiographic vs. anatomic density Quiz Quiz How are radiographic density and anatomic density related? – A. Directly – B. Inversely – C. They are not related in any way – D. Geometrically Radiographic Density Vs. Anatomic Density Radiographic Density Vs. Anatomic Density They are opposites Wherever the body tissue is the most dense, that’s where the radiographic density is the least dense ...
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