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, Eiichi Sato, Purkhet Abderyim, Purkhet Abderyim, Akihiro Osawa, Akihiro Osawa, Hiroshi Matsukiyo, Hiroshi Matsukiyo, Toshiyuki Enomoto, Toshiyuki Enomoto, Manabu Watanabe, Manabu Watanabe, Kiyomi Takahashi, Kiyomi Takahashi, Shigehiro Sato, Shigehiro Sato, Akira Ogawa, Akira Ogawa, Jun Onagawa, 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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