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Learn and test your knowledge

The WEO ADEC Library is an educational resource for endoscopists interested in improving their diagnostic skills in Image-Enhanced Endoscopy (IEE).

Here you can find expert presentations, clinical images, videos and quizzes from Advanced Diagnosis Endoscopy Course (ADEC) courses held around the world over the years.

The library offers an opportunity to learn about different imaging technologies, understand endoscopic classifications, review clinical cases, and test your knowledge.

ADEC library

Explore the library

The collection includes:

  • Imaging technologies: presentations and educational material from leading endoscope manufacturers worldwide.
  • Expert lectures: practical talks on different aspects of diagnostic endoscopy.
  • Clinical images and videos: examples to help you recognize and characterize lesions.
  • Endoscopic classifications: guidance on the use of different classification systems in daily practice.
  • Quizzes and clinical cases: test your knowledge and assess your diagnostic skills.

Explore the library and keep learning!

About the library

The ADEC initiative was established in 2009 under the auspices of OMED/WEO by Dr. Jean-François Rey, Prof. Hisao Tajiri, and Mr. Tetsu Watanabe, with kind help from Prof Hirohumi Niwa and many members of Japan Gastroenterological Endoscopy Society. Its aim was to promote Image-Enhanced Endoscopy and help endoscopists make better use of modern imaging techniques.

The ADEC teaching concept combines short expert lectures on endoscopic classifications with clinical quizzes and a voting system. This allows participants to apply their knowledge and assess their understanding.

With the development of new imaging technologies, the library was updated in November 2026. The latest material includes contributions from leading endoscope manufacturers worldwide, alongside new expert presentations and educational resources.

The library continues to grow thanks to contributions from experts and industry partners. We warmly welcome further scientific, educational, and technical contributions.

Access the library

The ADEC Library is available free of charge to all WEO members. To request access, please complete the short application form.

 

Apply Here
 

 

Acknowledgements

Our special thanks go to Dr Jean-François Rey, who coordinates the ADEC Library and has been instrumental in the development of this initiative since its beginning.

We are grateful to Professor Hisao Tajiri and all colleagues who have contributed their knowledge, presentations, and clinical material over the years. 

We also thank our industry partners for their continued support. In particular, we acknowledge Olympus for its support in making the ADEC educational resources freely available.