Method for the characterization of a bone tissue with an imaging device comprising a radiation emitter and utilizing a radiation sensor, said method being characterized in that it comprises the following steps: - acquisition of at least one grey scale image of said bone tissue with said imaging device at a value (MAS 1), known as measurement value, of an emission parameter relating to the emitted radiation, - measurement, by analysis of said image: • of a value (GLA 1) known as measured value, of a mean grey level, and • of a value, known as measured value, of a characterization parameter (H 1) of said bone tissue; said method being characterized in that it further comprises the following steps: - measurement, by analysis of said image, of a value (SD 1), known as measured value, of a standard deviation of the grey levels, - calibration, known as target calibration, of said measured value (H 1) of the characterization parameter with respect to a value (GLA cible), known as target value, of a predetermined mean grey level for said sensor, said calibration producing a value (H cible), known as target value, of said characterization parameter, - calibration, known as fixed calibration, of said measured value (SD 1) of the standard deviation of the grey levels with respect to a value (MAS fixe), known as fixed value, of the predetermined emission parameter, said calibration producing a value, known as fixed value (SD fixe), of the standard deviation of the grey levels, and - determination of a value (H corrigé), known as corrected value, of the value of said characterization parameter, as a function of said target value (H cible) of said characterization parameter, of said fixed value (SD fixe), and of a target value (SD cible) of the standard deviation of the grey levels. - acquisition of at least one grey scale image of said bone tissue with said imaging device at a value (MAS 1), known as measurement value, of an emission parameter relating to the emitted radiation, - measurement, by analysis of said image: • of a value (GLA 1) known as measured value, of a mean grey level, and • of a value, known as measured value, of a characterization parameter (H 1) of said bone tissue; • of a value (GLA 1) known as measured value, of a mean grey level, and • of a value, known as measured value, of a characterization parameter (H 1) of said bone tissue; - measurement, by analysis of said image, of a value (SD 1), known as measured value, of a standard deviation of the grey levels, - calibration, known as target calibration, of said measured value (H 1) of the characterization parameter with respect to a value (GLA cible), known as target value, of a predetermined mean grey level for said sensor, said calibration producing a value (H cible), known as target value, of said characterization parameter, - calibration, known as fixed calibration, of said measured value (SD 1) of the standard deviation of the grey levels with respect to a value (MAS fixe), known as fixed value, of the predetermined emission parameter, said calibration producing a value, known as fixed value (SD fixe), of the standard deviation of the grey levels, and - determination of a value (H corrigé), known as corrected value, of the value of said characterization parameter, as a function of said target value (H cible) of said characterization parameter, of said fixed value (SD fixe), and of a target value (SD cible) of the standard deviation of the grey levels.