Tunable narrow-photon-energy X-ray generator utilizing a tungsten-target tube

Satô, Eiichi; Sugiyama, Hiroshi; Ando, Masami; Tanaka, Etsuro; Mori, Hiromu; Kawai, Toshiaki; Inoue, Takashi; Takayama, K.; Onagawa, Jun; Ido, Hideaki

doi:10.1016/j.radphyschem.2005.11.019

Cited by 16 publications

(5 citation statements)

References 20 publications

(13 reference statements)

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“…Bremsstrahlung is electromagnetic radiation produced by deceleration of electrons (or more generally of charged particles), in the present case, due to deflection by the tungsten lattice nuclei. The main application in connection with tungsten is the X-ray tube [73][74][75][76][77][78][79][80][81][82][83][84], in which electrons are accelerated in a vacuum by an electric voltage onto a tungsten anode. Inelastic scattering of high-energetic protons (in the order of 1 GeV) with heavy nuclei (e.g.…”

Section: Publications On the Effect Of Irradiation And Plasma Interac...mentioning

confidence: 99%

Behavior of tungsten under irradiation and plasma interaction

Rieth

Doerner

Hasegawa

et al. 2019

Journal of Nuclear Materials

146

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Section: Publications On the Effect Of Irradiation And Plasma Interac...mentioning

confidence: 99%

Behavior of tungsten under irradiation and plasma interaction

Rieth

Doerner

Hasegawa

et al. 2019

Journal of Nuclear Materials

146

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“…We have developed several different monochromatic X-ray generators [3][4][5][6] to produce clean K-series characteristic X-rays. In particular, plasma X-ray generators [7,8] have major capabilities for producing extremely clean K-rays of nickel, copper, and molybdenum from weakly ionized linear plasmas consisting of metal ions and electrons.…”

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confidence: 99%

X-ray fluorescence camera for imaging of iodine media in vivo

Miyata

Watanabe

Satô

et al. 2009

Radiol Phys Technol

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X-ray fluorescence (XRF) analysis is useful for measuring density distributions of contrast media in vivo. An XRF camera was developed for carrying out mapping for iodine-based contrast media used in medical angiography. Objects are exposed by an X-ray beam from a cerium target. Cerium K-series X-rays are absorbed effectively by iodine media in objects, and iodine fluorescence is produced from the objects. Next, iodine Kalpha fluorescence is selected out by use of a 58-microm-thick stannum filter and is detected by a cadmium telluride (CdTe) detector. The Kalpha rays are discriminated out by a multichannel analyzer, and the number of photons is counted by a counter card. The objects are moved and scanned by an x-y stage in conjunction with a two-stage controller, and X-ray images obtained by iodine mapping are shown on a personal computer monitor. The scan pitch of the x and y axes was 2.5 mm, and the photon counting time per mapping point was 2.0 s. We carried out iodine mapping of non-living animals (phantoms), and iodine Kalpha fluorescence was produced from weakly remaining iodine elements in a rabbit skin cancer.

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“…By using a single silicon crystal and a conventional tungsten-target X-ray generator, quasi-monochromatic cone beams 4) have been formed and applied to monochromatic radiography, in which photon energy is tunable by adjusting Bragg's angle. It is well known that synchrotrons produce high-dose-rate monochromatic parallel beams using silicon crystals, and that such beams have been applied to enhanced iodine K-edge angiography, 5,6) phase-contrast radiography, 7,8) and crystallography.…”

Section: Introductionmentioning

confidence: 99%

Energy-Discriminating Gadolinium K-Edge X-ray Computed Tomography System

Miyata

Watanabe

Satô

et al. 2010

Jpn. J. Appl. Phys.

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An energy-discriminating K-edge X-ray computed tomography (CT) system is useful for increasing the contrast resolution of a target region utilizing contrast media and for reducing the absorbed dose for patients. The CT system is of the first-generation type of detector using cadmium telluride (CdTe). CT is performed by repeated translations and rotations of an object. Penetrating X-ray photons from the object are detected by a CdTe detector, and event signals of X-ray photons are produced using charge-sensitive and shaping amplifiers. Both photon energy and energy width are selected out using a multichannel analyzer, and the number of photons is counted by a countercard. To perform energy discrimination, a low-dose-rate X-ray generator for photon counting was developed. Its maximum tube voltage and minimum tube current were 110 kV and 1 mA, respectively. In energy-discriminating CT, the tube voltage and tube current were 100 kV and 20 mA, respectively, and the X-ray intensity was 2.98 mGy/s at a distance of 1.0 m from the source and a tube voltage of 100 kV. The demonstration of enhanced gadolinium K-edge X-ray CT was carried out by selecting photons with energies just beyond the gadolinium K-edge energy of 50.3 keV.

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Tunable narrow-photon-energy X-ray generator utilizing a tungsten-target tube

Cited by 16 publications

References 20 publications

Behavior of tungsten under irradiation and plasma interaction

Behavior of tungsten under irradiation and plasma interaction

X-ray fluorescence camera for imaging of iodine media in vivo

Energy-Discriminating Gadolinium K-Edge X-ray Computed Tomography System

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