This volume is the fourth in a series on quantitative coronary arteriography (QCA) published over the last seven years. Every two years the advances in this exciting field are presented by their leading experts. There is a significant growth in this field which has translated into the increasing sizes of the volumes published over the years. In addition to covering the developments in the more traditional items such as QCA and other modalities, and coronary blood flow and flow reserve, the following subjects have been emphasized in this particular volume: quality control in QCA, QCA in the major regression/progression trials, QCA in the major restenosis studies, QCA after recanalization techniques, and QCA and intracoronary prostheses. In addition, an extensive overview is given of QCA equipment and technical requirements. The book provides a comprehensive, accurate and up to date overview for all clinicians and physicists actively involved or otherwise interested in the developments in quantitative coronary arteriography.