The invention concerns a detecting apparatus (12) for imaging at least two areas of a brain of a subject (10), the detecting apparatus (12) comprising:—a holder comprising:—a frame (14) devoted to be cemented on the skull of the subject (10), the frame (14) delimitating an inner portion (18) which is transparent to ultrasound waves,—a removable imaging device comprising:—a platform (16) delimitating an inner space (28), the inner space (28) facing the inner portion (18),—a fixing element (30) adapted to temporary fix and lock the platform (16) to the holder,—an ultrasound probe (32), and—a moving stage (34) holding the ultrasound probe (32) and being adapted to move the ultrasound probe (32) within the inner space (28).
