Book excerpt: Computed radiography is one of the most promising digital radiography techniques, and is expected to replace the conventional screen film radiography in the near future. This book is the first textbook on computed radiography written by Japanese authors and describes basic technologies and clinical results obtained at various hospitals. There are more than 60 CR systems working in clinical environments in Japan. However, as yet there are not so many systems working outside Japan. This book is, therefore, a good introduction to the new technology and practice of the CR system all over the world.