A device (1) and a method for therapeutic treatment comprising an acoustic treatment transducer (2) able to emit high intensity waves (HIFU) toward a target (3) in order to treat the target. The high intensity waves have a focal point. The device comprises at least one detector (15) for detecting a change of tissue properties caused by the high intensity waves in the target (3). The device (1) further comprises at least one means for time measurement able to measure the time tmark from the beginning of the emission of a pulse of HIFU until a change of tissue properties is detected or means for detecting the frequency of appearance of changes of tissue properties.
