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Proceedings Paper

Novel embossed radiography system utilizing energy subtraction
Author(s): Akihiro Osawa; Eiichi Sato; Hiroshi Matsukiyo; Toshiyuki Enomoto; Manabu Watanabe; Jiro Nagao; Purkhet Abderyim; Etsuro Tanaka; Mitsuru Izumisawa; Akira Ogawa; Shigehiro Sato
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Paper Abstract

Digital subtraction is useful for carrying out embossed radiography by shifting an x-ray source, and energy subtraction is an important technique for imaging target region by deleting unnecessary region in vivo. X-ray generator had a 100-μm-focus tube, energy subtraction was performed at tube voltages of 40 and 60 kV, and a 3.0-mm-thick aluminum filter was used to absorb low-photon-energy bremsstrahlung x-rays. Embossed radiography was achieved with cohesion imaging using a flat panel detector (FPD) with pixel sizes of 48×48 μm, and the shifting distance of the x-ray source in horizontal direction and the distance between the x-ray source and the FPD face were 5.0 mm and 1.0 m, respectively. At a tube voltage of 60 kV and a tube current of 0.50 mA, x-ray intensities without filtering and with filtering were 307 and 28.4 μGy/s, respectively, at 1.0 m from the source. In embossed radiography of non-living animals, the spatial resolution measured using a lead test chart was approximately 70 μm, and we observed embossed images of fine bones, soft tissues, and coronary arteries of approximately 100 μm.

Paper Details

Date Published: 3 September 2008
PDF: 6 pages
Proc. SPIE 7080, Penetrating Radiation Systems and Applications IX, 708003 (3 September 2008); doi: 10.1117/12.795585
Show Author Affiliations
Akihiro Osawa, Toho Univ. School of Medicine (Japan)
Eiichi Sato, Iwate Medical Univ. (Japan)
Hiroshi Matsukiyo, Toho Univ. School of Medicine (Japan)
Toshiyuki Enomoto, Toho Univ. School of Medicine (Japan)
Manabu Watanabe, Toho Univ. School of Medicine (Japan)
Jiro Nagao, Toho Univ. School of Medicine (Japan)
Purkhet Abderyim, Iwate Univ. (Japan)
Etsuro Tanaka, Tokyo Univ. of Agriculture and Technology (Japan)
Mitsuru Izumisawa, Iwate Medical Univ. (Japan)
Akira Ogawa, Iwate Medical Univ. (Japan)
Shigehiro Sato, Iwate Medical Univ. (Japan)

Published in SPIE Proceedings Vol. 7080:
Penetrating Radiation Systems and Applications IX
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Richard C Schirato, Editor(s)

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