Résumé : We propose an atraumatic tomoscintigraphic method using cerebral 99mTc-HMPAO retention measured in a whole body counter (WBC) for absolute regional cerebral blood flow measurement (mL/min/100 g). Measurements concern 25 alcoholics in treatment for alcohol withdrawal, at the first ant the third week of hospitalisation. Results are compared with those of a 133Xe inhalation method; for the frontal and parietal ROI no difference was observed between the right side and the left side, nor between the 1st and the 3rd week of observation, whatever the method utilized.