System for real-time determination of characteristics of radio-chromic films, characterized in that it comprises: - one or more transmission optical fibers, adapted to transport an optical signal emitted by a light source located at one end of said one or more transmission optical fibers; - one or more collection optical fibers, adapted to transport the optical signal towards a measuring and processing system (5, 6) for measuring and processing said optical signal, located at one end of said one or more collection optical fibers; - an optical coupler adapted to couple said one or more transmission optical fibers and said one or more collection optical fibers in an optical cable; - an optical backscattering/reflection system adapted to: - house one end of said optical cable opposite to that of said light source and measuring and processing system (5, 6); - house a radio-chromic film of the type sensitive to ionizing radiations, so that it is hit by an optical signal transported by said one or more transmission optical fibers and emits an optical signal towards said one or more collection optical fibers; - receive ionizing radiation and convey it onto the area of said radio-chromic film hit by said optical signal, simultaneously with said optical signal emission. wherein said backscattering/reflection system comprises a perforated structure comprising in succession: - a first part adapted to house said end of the optical cable; - a slot adapted to house said radio-chromic film; - a second part adapted to house a scattering material; - a closing terminal part perforated at its center, allowing said ionizing radiation to enter and hit said radio-chromic film. - one or more transmission optical fibers, adapted to transport an optical signal emitted by a light source located at one end of said one or more transmission optical fibers; - one or more collection optical fibers, adapted to transport the optical signal towards a measuring and processing system (5, 6) for measuring and processing said optical signal, located at one end of said one or more collection optical fibers; - an optical coupler adapted to couple said one or more transmission optical fibers and said one or more collection optical fibers in an optical cable; - an optical backscattering/reflection system adapted to: - house one end of said optical cable opposite to that of said light source and measuring and processing system (5, 6); - house a radio-chromic film of the type sensitive to ionizing radiations, so that it is hit by an optical signal transported by said one or more transmission optical fibers and emits an optical signal towards said one or more collection optical fibers; - receive ionizing radiation and convey it onto the area of said radio-chromic film hit by said optical signal, simultaneously with said optical signal emission. wherein said backscattering/reflection system comprises a perforated structure comprising in succession: - a first part adapted to house said end of the optical cable; - a slot adapted to house said radio-chromic film; - a second part adapted to house a scattering material; - a closing terminal part perforated at its center, allowing said ionizing radiation to enter and hit said radio-chromic film. - house one end of said optical cable opposite to that of said light source and measuring and processing system (5, 6); - house a radio-chromic film of the type sensitive to ionizing radiations, so that it is hit by an optical signal transported by said one or more transmission optical fibers and emits an optical signal towards said one or more collection optical fibers; - receive ionizing radiation and convey it onto the area of said radio-chromic film hit by said optical signal, simultaneously with said optical signal emission. wherein said backscattering/reflection system comprises a perforated structure comprising in succession: - a first part adapted to house said end of the optical cable; - a slot adapted to house said radio-chromic film; - a second part adapted to house a scattering material; - a closing terminal part perforated at its center, allowing said ionizing radiation to enter and hit said radio-chromic film. - a first part adapted to house said end of the optical cable; - a slot adapted to house said radio-chromic film; - a second part adapted to house a scattering material; - a closing terminal part perforated at its center, allowing said ionizing radiation to enter and hit said radio-chromic film.