22 March 2010 Embossed radiography utilizing a subtraction program in conjunction with a 0.5-mm-focus x-ray tube
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Abstract
We developed an embossed radiography system utilizing single- and dual-energy subtractions for decreasing the absorption contrast of unnecessary regions, and contrast resolution of a target region was increased using image-shifting subtraction and a linear-contrast system in a flat panel detector (FPD). To carry out embossed radiography, we developed a computer program for two-dimensional subtraction, and a conventional x-ray generator with a 0.5-mm-focus tube was used. Energy subtraction was performed at tube voltages of 42.5 and 70.0 kV, a tube current of 1.0 mA, and an x-ray exposure time of 5.0 s. Embossed radiography was achieved with cohesion imaging by use of the FPD with pixel sizes of 48 ×48 μm, and the shifting dimension of an object in the horizontal and vertical directions ranged from 48 to 144 μm. We obtained high-contrast embossed images of fine bones and coronary arteries approximately 100 μm in diameter.
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Eiichi Sato, Purkhet Abderyim, Akihiro Osawa, Hiroshi Matsukiyo, Toshiyuki Enomoto, Manabu Watanabe, Kiyomi Takahashi, Shigehiro Sato, Akira Ogawa, Jun Onagawa, "Embossed radiography utilizing a subtraction program in conjunction with a 0.5-mm-focus x-ray tube", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76222I (22 March 2010); doi: 10.1117/12.844005; https://doi.org/10.1117/12.844005
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