Takeshi Johkoh

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PURPOSE To evaluate the usefulness of a commercially available computer-aided diagnosis (CAD) system that incorporates temporal subtraction for the detection of solitary pulmonary nodules on chest radiographs by readers with different levels of experience. MATERIALS AND METHODS Sixty pairs of chest radiographs in 30 patients with newly detected solitary(More)
  • Hironao Hozumi, Yutaro Nakamura, Takeshi Johkoh, Hiromitsu Sumikawa, Thomas V Colby, Masato Kono +6 others
  • 2013
OBJECTIVES To investigate the risk factors and prognosis associated with acute exacerbation (AE) in patients with rheumatoid arthritis-associated interstitial lung disease (RA-ILD). DESIGN A retrospective case-control study. SETTING A single academic hospital. PARTICIPANTS 51 consecutive patients diagnosed with RA-ILD between 1995 and 2012. All(More)
OBJECTIVE The objective of this study was to determine whether the various chronic cystic lung diseases can be differentiated on the basis of the pattern and distribution of abnormalities on high-resolution CT. MATERIALS AND METHODS High-resolution CT scans in 92 patients with chronic cystic lung diseases (18 with pulmonary Langerhans cell histiocytosis,(More)
  • Hironao Hozumi, Noriyuki Enomoto, Masato Kono, Tomoyuki Fujisawa, Naoki Inui, Yutaro Nakamura +6 others
  • 2015
BACKGROUND In polymyositis/dermatomyositis (PM/DM), anti-aminoacyl-tRNA synthetase (ARS) antibodies are closely associated with interstitial lung disease (ILD), a frequent pulmonary complication. However, the clinical significance of anti-ARS antibodies is not well established. OBJECTIVE We aimed to evaluate the clinical significance of anti-ARS(More)
Experiments were conducted to confirm the isotropic spatial resolution of multislice CT with a 0.5 mm slice thickness. Isotropic spatial resolution means that the spatial resolution in the transaxial plane (X-Y plane) and that in the longitudinal direction (Z direction) are equivalent. To obtain point spread function (PSF) values in the X-Y-Z directions,(More)