The development of the International Classification of CT for Pneumoconioses---in accordance with revision of ILO 1980 system

本项目目的：在德国、芬兰、日本研究人员独立开发的现有尘肺CT国际分类的基础上，制定尘肺CT国际分类。项目背景及成果：本项目在德国、芬兰和日本研究人员的倡议下，在日本文部科学省的资助下启动，目的是开发国际尘肺CT分类。在这个项目的第一年，我们邀请了一位已经开发了自己的分类系统的法国研究人员，以及对这个主题感兴趣的比利时研究人员。所有合作研究人员基本同意成像参数和需要为HRCT制定分类，用于石棉相关肺部疾病的临床诊断、筛查和监测。在此基础上，我们在2000年6月的日光会议上全面制定了分类候选人。我们收集了HRCT胶片样本，代表了建议表格中描述的石棉沉滞症的每一个纤维化发现。我们决定通过测试多个读者的良好一致性来提取标准影片。通过多特蒙德会议时进行的试读来评估开发的分类系统。在多特蒙德会议上，通过试读提取的标准片子得到了保证，《石棉相关疾病CT国际分类》的整个部分几乎已准备好出版。然而，没有理由将新开发的分类对象仅限于石棉相关的肺部疾病。我们同意扩大CT分类范围，不仅适用于一般的尘肺病，也适用于职业和环境呼吸系统疾病（OERD）。

Objective of this project : This project is to develop International Classification of CT for Pneumoconioses based on the existing classifications that were developed by German, Finnish and Japanese researchers independently.Background and achievement of the project : With the initiative of German, Finnish and Japanese researchers this project started with the Grant in Aid from Ministry of Education, Culture, Sports, Science and Technology, Japan for the purpose of developing the International Classification of CT for Pneumoconioses.In the first year of this project, we invited a French researcher who has developed his own classification system, and Belgian researchers who are interested in the subject. All the collaborating researchers basically agreed on the imaging parameters and the need to develop classification for the HRCT that is designated for the purpose of clinical diagnosis, screening and surveillance for asbestos-related lung diseases. On that basis, we have fully developed the classification candidate at the Nikko meeting in June 2000. We have collected sample HRCT films that represent the each fibrotic finding for asbestosis described on the proposed sheet. We decided to extract the standard films by testing the good agreement by multiple readers. The developed classification system was assessed by trial reading that was performed by the time of Dortmund meeting.At the Dortmund meeting, the standard films extracted by the trial reading were assured and the whole body of the International Classification of CT for Asbestos-related Diseases was almost ready to be published. However, there is no reason to restrict the subjects of newly developed classification only to the asbestos-related lung diseases. We agreed to expand the CT classification for no only Pneumoconioses in general, but also Occupational and Environmental Respiratory Diseases(OERD).