The IRSN and the InVS have been collaborating since 2003 to provide public authorities, professionals, and the general public with up-to-date data on population exposure resulting from medical diagnostic procedures involving ionizing radiation. As part of this collaboration, a survey was conducted in 2008–2009 among 50 radiology departments in the public hospital sector. This report presents the results of the dosimetric component of this survey. For the most common types of procedures (in conventional radiology and computed tomography), dosimetric parameters are analyzed to provide average values for PDS, PDL, or CTDIvol by procedure type. These values enabled the calculation, for these types of procedures, of the average doses delivered to organs located within the scanned volume, as well as the average effective dose. Given the limitations of the concept of effective dose in radiology, this dosimetric indicator should be supplemented by the dose delivered to the most radiosensitive organs located within the scanned volume. (R.A.)