| 摘要 |
The invention concerns radiology systems and, more particularly, in such systems, to a method to determine and calibrate the lumination (namely the quantity of light received multiplied by the exposure time) received by the radiographic film in order to obtain a given blackening of the film. This method consists in carrying out a certain number of calibrations of the radiology system, and then in making a sensitogram of the type of film used. Then, a radiographic shot is taken with an object of a known thickness Eo and, to obtain a reference optical density DOrefo, the optical density DOm of the shot obtained is measured and compared with DOrefo on the sensitogram to determine Lref.
|
