Low Intensity Contact Ultrasound Implant 

For Improved Brain Therapy

The treatment of brain tumors using chemotherapy is currently not very effective. One of the major causes is the low penetration of chemotherapeutic agents into the brain due to the blood-brain barrier (BBB).

Many articles in the scientific literature have demonstrated the the blood-brain barrier can be opened using ultrasound in combination with systemic injection of an ultrasound contrast agent. This opening allows for an increased concentration of chemotherapeutic agents in brain tissue. Until now, all of the research in the field has used focused external ultrasound (HIFU) and is limited to small areas in the brain.

Primary brain tumors are often a diffuse disease. The objective of CarThera® is to open a larger zone of the BBB to allow for an optimal penetration of chemotherapy drugs in the brain. In addition, as chemotherapy sessions are performed repeatedly, our ultrasound system is compatible with repeated opening of the BBB in an outpatient setting.

The histological diagnosis or surgical resection of brain tumors requires an opening of the skull. This opening is normally followed by a closing of the skull opening. The idea for the SonoCloud® was to use this opening in the skull to implant an ultrasound device.



“Our primary innovation was to work on a device that emitted unfocused ultrasound from within the skull to avoid distortion of the ultrasound waves and to simplify the technique for repeated treatments. Thus was born the SonoCloud® program” as explained by Pr. Alexandre Carpentier.



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  • News CarThera

    June 2019: CarThera appoints Pascal E. R. Girin as chairman of board of directors

    Pascal Girin brings wealth of experience in medical device and life sciences industries to support CarThera’s future growth. Girin has decades of business expertise in the life sciences and medical devices markets, most recently as CEO of Balt, a leader in the treatment of neurovascular diseases. Prior to this, he held numerous C-level positions at leading medical companies, including Wright Medical, Keystone Dental (a Warburg Pincus company), EV3, Baxter and Ohmeda, among others. As chairman of CarThera’s board of directors, he will bring invaluable insight to the company’s business strategy and future development.

    March 19: CarThera publishes complete results of Phase I/IIa clinical trial using its SonoCloud-1 ultrasound implant

    Final results of the phase I/IIa clinical trial (NCT02253212) on the ultrasound-induced blood-brain barrier (BBB) opening improving the efficiency of carboplatin chemotherapy for recurrent glioblastoma patients were published in AACR’s Clinical Cancer Research journal of the . Study results show a good safety profile and encouraging efficacy. These results are based on 65 sonication sessions with escalating ultrasound pressure levels. GBM patients treated with optimal pressure levels and MRI-detected disrupted BBB (11 patients) showed a median progression-free survival (PFS) of 4.11 months and a median overall survival (OS) of 12.94 months. This compares to 2.73 months and 8.64 months respectively, for GBM patients without BBB disruption (8 patients).

    CarThera closes €9M ($10.3M) Series B funding round

    €9M ($10.3M) was raised with three institutional investors, Panakès Partners, Sham Innovation Santé (advised by Turenne Capital) and Supernova Invest via its fund Supernova 2, as well as Group Arnault and historical investors. The proceeds will be used to further advance the SonoCloud technology and develop the clinical pipeline of the company. A multi-center study has already been launched in France and in the US to evaluate the SonoCloud-9 device, a new generation of implant with nine ultrasound emitters, in patients with recurrent glioblastoma. The company also has an on-going clinical study with the SonoCloud-1 device in patients with Alzheimer’s disease and one planned for patients with brain metastases.