1 February 2007 K-edge magnification digital angiography using a 100-um-focus tungsten tube
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Abstract
A microfocus x-ray tube is useful to perform magnification digital radiography, including phase-contrast effects. The 100-m-focus x-ray generator consists of a main controller for regulating the tube voltage and current, and a tube unit with a high-voltage circuit and a fixed anode x-ray tube. The maximum tube voltage, current, and electric power are 105 kV, 0.5 mA, and 50 W, respectively. Using a 3-mm-thick aluminum filter, the x-ray intensity is 26.0 Gy/s at 1.0 m from the source, with a tube voltage of 60 kV and a current of 0.50 mA. Because the peak photon energy is approximately 35 keV using the filter with a tube voltage of 60 kV, the bremsstrahlung x-rays are absorbed effectively by iodine-based contrast media with an iodine K-edge of 33.2 keV. Magnification angiography is performed by three-fold magnification imaging with a computed radiography sys-tem using iodine-based microspheres 15 m in diameter. In angiography of nonliving animals, we observe fine blood vessels approximately 100 m with high contrasts.
© (2007) Society of Photo-Optical Instrumentation Engineers (SPIE)
Eiichi Sato, Eiichi Sato, Etsuro Tanaka, Etsuro Tanaka, Hidezo Mori, Hidezo Mori, Hiroki Kawakami, Hiroki Kawakami, Toshiaki Kawai, Toshiaki Kawai, Takashi Inoue, Takashi Inoue, Akira Ogawa, Akira Ogawa, Mitsuru Izumisawa, Mitsuru Izumisawa, Kiyomi Takahashi, Kiyomi Takahashi, Shigehiro Sato, Shigehiro Sato, Kazuyoshi Takayama, Kazuyoshi Takayama, } "K-edge magnification digital angiography using a 100-um-focus tungsten tube," Optical Engineering 46(2), 026503 (1 February 2007). https://doi.org/10.1117/1.2542285 . Submission:
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