For his part, the head of Department of Medical Physics at King Faisal Specialist Hospital and Research Center in Riyadh and Chairman of the Fourth World Radiology Congress Organizing Committee, Dr. Belal Muftah said in his speech that the four-day congress enjoys the participation of 60 international speakers belonging to the prestigious global institutions in the United States, Canada, Britain, France, Germany, Italy, Spain, Austria, and Switzerland, in addition to 100 local and regional spokesmen having great experiences in this area. --SPA 14:08 LOCAL TIME 11:08 GMT www.spa.gov.sa/w