MRI-guided Focused Ultrasound : Feasibility Study for the Treatment of Bone Metastases and osteoïd Osteoma

Inclusion Criteria: * Subject with one or more painful bone metastases (EVA≥5) * Subject with sub-perolate or cortical osteoid osteoma * For people with painful bone metastases: first-line treatment or radiotherapy failure * Weight \< 140kg. * Target tumor accessible by HIFU-MRI * Maximum size of the lesion - 20cm² * Depth of the lesion to be treated - 4mm and 10cm * Subject affiliated with a health insurance social protection. * A subject capable of understanding research objectives and risks and giving informed and signed consent * Subject who has been informed of the pre-medical visit results Exclusion Criteria: * MRI contraindication * Contraindication to the use of a gadolinium contrast or hypersensitivity to gadoteric acid, meglumine or any drug containing gadolinium * General anesthesia contraindication * Non-reversible hemostasis disorders * Previous injury on the area to be treated (radiotherapy, surgery, ...) * Tumors located on the spine or skull * Tumors located on the ribs * Pathological fracture * For Osteoid Osteoma: nidus more than 1cm deep within cortical bone * Pregnant woman (pregnancy test, urinary or HCG dosage, negative to inclusion) or lactating * existence of dermatological pathologies * Subject with a known latex allergy * Subject under safeguarding of justice, under guardianship or curatorship * Subject in an exclusion period by a previous or ongoing study