A Simple Method for Differentiating Complicated Parapneumonic Effusion/Empyema from Parapneumonic Effusion Using the Split Pleura Sign and the Amount of Pleural Effusion on Thoracic CT

• Naoki Tsujimoto ,

  ¶‡ Naoki Tsujimoto and Takeshi Saraya are double first authors.

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Takeshi Saraya ,

  * E-mail: sara@yd5.so-net.ne.jp

  ¶‡ Naoki Tsujimoto and Takeshi Saraya are double first authors.

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Richard W. Light,

  Affiliation Division of Allergy/Pulmonary/Critical Care, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America

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• Yayoi Tsukahara,

  Affiliation Department of Radiology, Kyorin University School of Medicine, Tokyo, Japan

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• Takashi Koide,

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Daisuke Kurai,

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Haruyuki Ishii,

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Hirokazu Kimura,

  Affiliation Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan

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• Hajime Goto,

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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• Hajime Takizawa

  Affiliation Department of Respiratory Medicine, Kyorin University School of Medicine, Tokyo, Japan

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