An apparatus for diagnosis assistance and/or treatment of a pathology comprising: - an ultrasound generator device, previously implanted, - a remote control unit for determining and controlling operating parameters of the ultrasound generator device, and providing it with electricity during at least one activation cycle, each activation cycle being preceded by a standby cycle, - means of electrical connection (31, 32) between the ultrasound generator device and the control unit, characterised in that the control unit is programmed to detect, during at least one standby cycle, a fault with the electrical junction consisting of an absence of electrical link between the ultrasound generator device and said control unit, said detection of a junction fault consisting of: - During said and at least one standby cycle: ∘ emitting (410, 411, 412, 413), by the control unit, at least one control signal at at least a first instant of the standby cycle, said and at least one control signal comprising a low-power electrical pulse signal emitted at a frequency selected within a range of working frequencies of a transducer of the ultrasound generator device, ∘ acquiring (420, 421, 422, 423), by the control unit, at least one feedback signal in response to said and at least one emitted control signal, ∘ processing (430, 431, 433), by the control unit, of said and at least one feedback signal acquired to detect an electrical connection fault between the ultrasound generator device and the control unit, - During said and at least one activation cycle subsequent to said and at least one standby cycle: ∘ emitting, by the control unit, an activation signal of the ultrasound generator device if no electrical junction fault is detected, ∘ absence of emission, by the control unit, of the activation signal if an electrical junction fault is detected. - an ultrasound generator device, previously implanted, - a remote control unit for determining and controlling operating parameters of the ultrasound generator device, and providing it with electricity during at least one activation cycle, each activation cycle being preceded by a standby cycle, - means of electrical connection (31, 32) between the ultrasound generator device and the control unit, - During said and at least one standby cycle: ∘ emitting (410, 411, 412, 413), by the control unit, at least one control signal at at least a first instant of the standby cycle, said and at least one control signal comprising a low-power electrical pulse signal emitted at a frequency selected within a range of working frequencies of a transducer of the ultrasound generator device, ∘ acquiring (420, 421, 422, 423), by the control unit, at least one feedback signal in response to said and at least one emitted control signal, ∘ processing (430, 431, 433), by the control unit, of said and at least one feedback signal acquired to detect an electrical connection fault between the ultrasound generator device and the control unit, ∘ emitting (410, 411, 412, 413), by the control unit, at least one control signal at at least a first instant of the standby cycle, said and at least one control signal comprising a low-power electrical pulse signal emitted at a frequency selected within a range of working frequencies of a transducer of the ultrasound generator device, ∘ acquiring (420, 421, 422, 423), by the control unit, at least one feedback signal in response to said and at least one emitted control signal, ∘ processing (430, 431, 433), by the control unit, of said and at least one feedback signal acquired to detect an electrical connection fault between the ultrasound generator device and the control unit, - During said and at least one activation cycle subsequent to said and at least one standby cycle: ∘ emitting, by the control unit, an activation signal of the ultrasound generator device if no electrical junction fault is detected, ∘ absence of emission, by the control unit, of the activation signal if an electrical junction fault is detected. ∘ emitting, by the control unit, an activation signal of the ultrasound generator device if no electrical junction fault is detected, ∘ absence of emission, by the control unit, of the activation signal if an electrical junction fault is detected.