Ljubomir A. Diankov: Professor of Radiology and Head of the Department of Radiology at the Clinical Center of Endocrinology, Faculty of Medicine in Sofia. Dr. Diankov has Ph.D. and Sc.D. degrees. His research interests focus on General Radiology, Musculoskeletal Radiology and Endocrine Imaging. He is Editor-in-Chief of "Roentgenologia & Radiologia"; Member of the Boards of "Bulgarian Medicine", "Endocrinologia" "Radiologe", "Frontiers in European Radiology", "Radiologia Diagnostica", "Publications in Osteology", "Acta Radiol. Portug.", "British Journal of Radiology". He is Member of the Bulgarian Association of Radiology, Honorary Member of the Hungarian Radiology Society, Honorary Member of the Russian Association of Radiology, Corresponding Member of the German Society of Medical Radiology, Founding Member of the European Society of Musculoskeletel Radiology, Member of the Academic Board of the European College of Radiological Education, Member of the European Association of Radiology.

Kitchka Velkova: Professor of Radiology and Head of the Department of Radiology at Medical University - Plovdiv. Prof. Velkova is a Chair-man of the Bulgarian Council of Educators. She is an active Member of New York Academy of Science, active Member of the European Society of Urogenital Radiology (ESUR), active Member of Cardio-vascular and interventional Radiology Society of Europe (CYRSE).

Dimitar N. Baltadjiev: Assistant Professor and Head of the Department of Medical Informatics at Transport Medical Institute in Sofia. He was conferred Ph.D. in Medical Informatics from Medical University of Sofia in 1995. Dr. Baltadjiev is specialist of Medical Informatics and Health Management. His research interests cover image analysis and 3D visualization, telemedicine and teleradiology. He is Editorial Secretary of "Roentgenologia & Radiologia" and Member of Bulgarian Society of Medical Informatics, European Federation of Medical Informatics.

Galina I. Kirova-Nedialkova: Research Associate in the Imaging Diagnostic Section, Department of CT at the National Oncological Center in Sofia. Since 1990 Dr. Kirova is specialist of Radiology. Her research interests focus on Radiology of the chest, Malignant disorders of the lung, Interstitial disorders of the lung. She is Editorial Secretary of "Roentgenologia & Radiologia" and Member of Bulgarian Association of Radiology, Bulgarian Association of Rheumatology, Bulgarian Association of Oncology, Bulgarian Union of Pulmonology, Balkan Union of Oncology, European Association of Radiology, European Junior Forum of Radiology, Member of the European Association of Radiology.

Hristina K. Hadjikostova: Assistant Professor in the Department of Nuclear Medicine at the Medical University in Sofia. Since 1983, Dr. Hadjikistova is specialist of Nuclear Medicine. Her research interests focus on General Nuclear Medicine, Nuclear Pulmonology, Nuclear Cardiology, Nuclear Oncology. She is Editorial Secretary of "Roentgenologia & Radiologia" and Member of the European Association of Nuclear Meidicne, Bulgarian Association of Radiology, Treasurer of Bulgarian Association of Nuclear Medicine, Member of the European Association of Radiology.

Lilia B. Gocheva: Assistant Professor of Radiology in Radiotherapy Department, Faculty of Medicine in Sofia. She has received her Ph.D. in 1998. Her research interests focus on Radiotherapy of Breast cancer, Lung cancer, carcinoma of Genitourinary tract and especially the field of Larg field radiotherapy as Whole abdomen irradiation, Half body radiotherapy and Total body radiotherapy. She is a Member of the Editorial Board of "Roentgenologia & Radiologia", Bulgarian Association of Radiology, International Union of Oncology (UICC), European Society for Therapeutic Radiology and Oncology (ESTRO), Founing Member of Balkan Union of Oncology, Member of the European Association of Radiology.

Sevdalina Z. Topalova: Research Associate in the Department of Radiobiology at the National Center of Radiobiology and Radiation Protection in Sofia. She is a specialist in the field of Radiobiology, Experimental Radiation Haematology, Radiobiology of the low dose, prophilaxis of the late effects of ionizing radiation. She is a Member of the Bulgarian Association of Radiology, Section of Radiobiology and Radiation Protection, Member of the European Association of Radiology.

Milan P. Totev: Assistant Professor of Radiology and Head of the Department of Interventional Radiology at the Emergency Medicine Institute "N.I. Pirogov" in Sofia. Dr. Totev is specialist of Radiology since 1990. His research interests include Interventional Radiology. He is Secretary-treasurer of the Bulgarian Association of Radiology and Member of Bulgarian Association of Radiology, European Association of Radiology, American Association of Emergency Radiology, Bulgarian Association of Ultrasound in Medicine, European Federation of Societies for Ultrasound in Medicine and Biology, Member of the European Congress of Radiology.