Dear colleague, the 9th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD04) will be held on May 23-26, 2004 at the University of Siena, Italy. The conference will focus on the applications of detectors in particle physics experiments, both with and without accelerators, and on the perspectives opened by balloon-borne and space based experiments. Special attention will be devoted to the application of these detectors in other fields (medicine, biology, astrophysics and others). The conference will consist of only plenary sessions. There will be a mixture of overview talks and shorter contributions. The presentation of posters is also foreseen. For more information or to submit an abstract please visit our web site: http://www.bo.infn.it/sminiato/siena04.html Apologies if you receive this message more than once. Best regards Carlo Bosio - Rome Francesca Romana Cavallo - Bologna Massimo Lenti - Florence Pier Simone Marrocchesi - Siena Francesco-Luigi Navarria - Bologna Marco Paganoni - Milan Piergiovanni Pelfer - Florence please reply to kaos [at] bo.infn.it (in real life FLN) The Topical Seminars series