The Internet has proven to be a great resource for the medical community. It has specifically had a great impact on the practice of Radiology. It has enabled the proliferation, installation, and acceptance of adjunct technologies such as Picture Archiving (PACS), electronic medical record (EMR) and Voice Recognition (VR). The number of radiology-specific web sites just 5 years ago was about 30. A recent compilation now numbers in the thousands. Computer technology and the Internet have revolutionized the way radiologists work on a daily basis. All aspects of the Internet and related technologies are explained in this book.