Variations in Cerium X-ray Spectra and Enhanced K-Edge Angiography

  • Sato Eiichi
    Department of Physics, Iwate Medical University
  • Tanaka Etsuro
    Department of Nutritional Science, Faculty of Applied Bio-science, Tokyo University of Agriculture
  • Mori Hidezo
    Department of Cardiac Physiology, National Cardiovascular Center Research Institute
  • Kawai Toshiaki
    Electron Tube Division #2, Hamamatsu Photonics K.K.
  • Inoue Takashi
    Department of Neurosurgery, School of Medicine, Iwate Medical University
  • Ogawa Akira
    Department of Neurosurgery, School of Medicine, Iwate Medical University
  • Yamadera Akira
    Department of Radiological Technology, School of Health Sciences, Hirosaki University
  • Sato Shigehiro
    Department of Microbiology, School of Medicine, Iwate Medical University
  • Ito Fumihito
    Digital Culutre Technology Corp.
  • Takayama Kazuyoshi
    Shock Wave Research Center, Institute of Fluid Science, Tohoku University
  • Onagawa Jun
    Department of Applied Physics and Informatics, Faculty of Engineering, Tohoku Gakuin University
  • Ido Hideaki
    Department of Applied Physics and Informatics, Faculty of Engineering, Tohoku Gakuin University

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Abstract

A cerium-target X-ray tube is useful in performing cone-beam K-edge angiography because K-series characteristic X-rays from the cerium target are absorbed effectively by iodine-based contrast media. The X-ray generator consists of a main controller and a unit with a high-voltage circuit and a fixed anode X-ray tube. The tube is a 1.0-mm-focus diode with a cerium target and a 0.5-mm-thick beryllium window. The maximum tube voltage and current were 65 kV and 0.4 mA, respectively. Cerium Kα rays were selected out using a barium sulfate filter, and the X-ray intensities without filtering and with a barium sulfate filter were 209 and 16.8 μGy/s, respectively, at 1.0 m from the source with a tube voltage of 60 kV and a current of 0.40 mA. Angiography was performed with an X-ray film using the filter and iodine-based microspheres 15 μm in diameter. In the angiography of nonliving animals, we observed fine blood vessels approximately 100 μm in diameter with high contrasts.

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