ndustrial process tomography remains a multidisciplinary field with considerable interest for many varied participants. Indeed this adds greatly to its appeal. It is a pleasure and a privilege to once again act as guest editor for a special feature issue of Measurement Science and Technology on industrial process tomography, the last being in December 2002. Those involved in the subject appreciate the efforts of Measurement Science and Technology in producing another issue and I thank the journal on their behalf | IAEA-TECDOC-1589 Industrial Process Gamma Tomography Final report of a coordinated research project 2003-2007 May 2008 IAEA-TECDOC-1589 Industrial Process Gamma Tomography Final report of a coordinated research project 2003-2007 w AEA_-. International Atomic Energy Agency May 2008 The originating Section of this publication in the IAEA was Industrial Applications and Chemistry Section International Atomic Energy Agency Wagramer Strasse 5 . Box 100 A-1400 Vienna Austria INDUSTRIAL PROCESS GAMMA TOMOGRAPHY IAEA VIENNA 2008 IAEA-TECDOC-1589 ISBN 978-920-0-104508-9 ISSN 1011-4289 IAEA 2008 Printed by the IAEA in Austria May .