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  1. No Access

    Article

    Relationship between image information content and observer performance in digital intraoral radiography

    This study conducted a receiver operating characteristic (ROC) analysis by applying improved cluster signal-to-noise (CSN) analysis to digital intraoral radiographs and develop an observer-free method of analy...

    Shinya Takarabe, Kazutoshi Okamura, Taku Kuramoto, Kenji Tokumori… in Oral Radiology (2023)

  2. No Access

    Article

    Evaluation of resolution characteristics of digital intraoral radiographic images using a task transfer function

    This study aimed to quantitatively examine the effect of digital image processing of digital intraoral radiographic images on the resolution characteristics of the output image using a task transfer function (...

    Taku Kuramoto, Shinya Takarabe, Hiroki Tsuru, Yusuke Shibayama… in Oral Radiology (2022)

  3. No Access

    Article

    Evaluation of basic characteristics of a semiconductor detector for personal radiation dose monitoring

    Real-time radiation dose management is important because staff members working in interventional radiology may be exposed to relatively high doses of primary and scattered radiation from the body of a patient....

    Kento Terasaki, Toshioh Fujibuchi, Hiroo Murazaki… in Radiological Physics and Technology (2017)

  4. No Access

    Chapter and Conference Paper

    Examination of energy subtraction method by using diffracted monochromatic x rays

    The purpose of this research is to apply monochromatic x rays to the energy subtraction (ES) method. The ES method is a technique that eliminates an image of an arbitrary material by subtracting two images acq...

    Taku Kuramoto, Koji Maeda, Hideki Sakakibara… in World Congress on Medical Physics and Biom… (2009)

  5. No Access

    Article

    Effect of pulsed DC current on atomic diffusion of Nb–C diffusion couple

    The effect of pulsed DC current on the atomic diffusion of an Nb–C system using Spark Plasma Sintering (SPS) was investigated. In all experiments, a current density of approximately 723 A/cm2 was applied to the s...

    Takayuki Kondo, Masahide Yasuhara, Taku Kuramoto… in Journal of Materials Science (2008)

  6. No Access

    Chapter and Conference Paper

    Sharpening of an energy band of diagnostic x-ray spectrum with metal filters

    The present study aims to sharpen an energy band of x-ray spectrum by combinations of different metal filters and to evaluate the spectral sharpness. Since the usual radiography utilizes x rays with a broad en...

    Taku Kuramoto, Masachika Ohshita, Koji Maeda… in World Congress on Medical Physics and Biom… (2007)

  7. No Access

    Chapter and Conference Paper

    Properties of energy subtraction images obtained by x rays with sharpened energy spectrum

    The energy subtraction (ES) method is a technique that eliminate an image of an arbitrary organ by subtracting two images acquired by x rays with different energy owing to the property that an absorption coeff...

    Masachika Ohshita, Taku Kuramoto, Koji Maeda… in World Congress on Medical Physics and Biom… (2007)