Magnification Embossed Radiography Utilizing Image-Shifting Subtraction Program
スポンサーリンク
概要
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We developed an image-shifting subtraction program and carried out magnification embossed radiography (MER) utilizing single- and dual-energy subtractions. In particular, dual-energy subtraction was carried out to decrease the absorption contrast of unnecessary regions. The contrast resolution of the target region was increased by the use of subtraction software and a linear-contrast system in a flat-panel detector (FPD). The X-ray generator had a 100-μm-focus tube, and the subtractions were performed at tube voltages of 40 and 70 kV, a tube current of 0.50 mA, and an X-ray exposure time of 5.0 s. MER images with threefold magnification were obtained using the FPD with a pixel size of $48\times 48$ μm2, and the shifting dimensions of the imaged object in the horizontal and vertical directions ranged from 48 to 192 μm. At a shifting distance ranging from 48 to 144 μm, the spatial resolutions in the horizontal and vertical directions measured with a lead test chart were both 50 μm. In the MER of nonliving animals, we obtained high-contrast embossed images of fine bones, gadolinium oxide particles in blood vessels, and iodine-based microspheres in coronary arteries of approximately 100 μm diameter.
- 2010-03-25
著者
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Osawa Akihiro
Third Department Of Surgery Toho University School Of Medicine
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PURKHET Abderyim
Department of Computer Science Graduate School of Engineering Iwate University
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Watanabe Manabu
Third Department Of Surgery Toho University School Of Medicine
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Sato Eiichi
Department Of Information And Electronics Engineering Niigata Institute Of Technology
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Jiro Nagao
Third Department of Surgery, Toho University School of Medicine, 2-17-6 Ohashi, Meguro, Tokyo 153-8515, Japan
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Hiroshi Matsukiyo
Third Department of Surgery, Toho University School of Medicine, 2-17-6 Ohashi, Meguro, Tokyo 153-8515, Japan
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Toshiyuki Enomoto
Third Department of Surgery, Toho University School of Medicine, 2-17-6 Ohashi, Meguro, Tokyo 153-8515, Japan
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Katsuo Aizawa
Tokyo Medical University [Professor Emeritus], 6-1-1 Shinjuku, Shinjuku, Tokyo 160-8402, Japan
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Etsuro Tanaka
Department of Nutritional Science, Faculty of Applied Bio-science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo 156-8502, Japan
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Hidezo Mori
Department of Physiology, Tokai University, School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan
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Toshiaki Kawai
Organization for Hamamatsu Technopolis, Head quarters of Hamamatsu Knowledge Cluster, 2-7-1 Higashiiba, Naka-ku, Hamamatsu 432-8036, Japan
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Akira Ogawa
Department of Neurosurgery, School of Medicine, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
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Kiyomi Takahashi
Department of Microbiology, School of Medicine, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
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Shigehiro Sato
Department of Microbiology, School of Medicine, Iwate Medical University, 19-1 Uchimaru, Morioka 020-8505, Japan
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Jun Onagawa
Department of Electronics, Faculty of Engineering, Tohoku Gakuin University, 1-13-1 Chuo, Tagajo, Miyagi 985-8537, Japan
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Katsuo AIzawa
Tokyo Medical University (Professor Emeritus), 6-1-1 Shinjuku, Shinjuku, Tokyo 160-8402, Japan
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Akihiro Osawa
Third Department of Surgery, Toho University School of Medicine, 2-17-6 Ohashi, Meguro, Tokyo 153-8515, Japan
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Eiichi Sato
Department of Physics, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
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Kiyomi Takahashi
Department of Microbiology, School of Medicine, Iwate Medical University
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Sato Eiichi
Department of Anatomic Pathology, Tokyo Medical University
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