At Guided Therapy Systems (GTS) our ultrasound technologies are providing new, effective and safer treatment options without the downtime and complications associated with traditional surgeries and invasive procedures

Leaders in Ultrasonic
Imaging and Therapy

Throughout the past 25 years, GTS has become a world leader in ultrasonic imaging and therapy with technologies sold across the globe by many of the most recognizable and respected names in medical devices. Moreover, we are the first company in the world to develop and commercialize products that combine ultrasound imaging with intense therapeutic ultrasound, offering physicians the unprecedented ability to image and treat with the same equipment, thus targeting and evaluating tissue prior, during, and after a procedure.

After originally developing a minimally invasive platform for the destruction of non-resectable tumors, GTS brought intense therapeutic ultrasound to the forefront of the aesthetic device landscape through the creation of Ulthera in 2004. To this day, the Ulthera system is the only energy-based technology with an FDA indication for non-invasive tissue lift. Ulthera was recently acquired by Merz Pharma in 2014, and now with millions of procedures performed by physicians around the world, Ulthera/Merz remains as GTS’s exclusive licensee to the Ulthera technology in the professional aesthetic market.

Next Generation
Technology Development

GTS has also expanded its focus to the treatment of chronic, soft tissue injuries with the development of Actisound. This next generation ITU technology is the first and only non-invasive ablative device for pain reduction associated with chronic musculoskeletal injuries. The Actisound system received CE mark in 2018 and is currently available in select European and Asian markets.

GTS (through our exclusive partnership with Ardent Sound) is an FDA approved developer and manufacturer with ISO 13485 certification. Today, GTS has more than 250 patents issued, published, and pending in support of our imaging and intense therapeutic ultrasound products as we continue to create new technologies and make new advancements.

From non-invasive facelifts to the repair of chronic soft tissue injuries
GTS is helping people live healthier, happier, and more active lives


Our team is made up of a talented group of mechanical, electrical, and biomedical engineers and technicians,
as well as quality systems, operations, marketing, and sales professionals.


Chief Executive Officer/Chief Technology Officer

Before founding Guided Therapy Systems, Dr. Slayton served as Vice President of Advanced Development and Board Member for Dornier MedTech GmbH (a Daimler Benz Company). He has over 30 years senior management and technical responsibility in engineering, development, and manufacturing functions; focused primarily on new diagnostic and therapeutic ultrasound applications.

He helped develop over 70 commercially successful products ranging from electron beam and laser instruments to a variety of ultrasonic systems, scan heads, and transducers.

Dr. Slayton has published more than 50 technical papers and has been personally awarded more than 200 patents issued, published, and pending. He is a visiting faculty member at the University of Arizona’s College of Engineering.

His degrees include a M.S. in Quantum Radiophysics and a Ph.D. in Electrical Engineering from Kiev State University and USSR Academy of Sciences, respectively.


Chief Operating Officer

Steve Zastrow is responsible for the commercialization of GTS’s Intense Therapeutic Ultrasound technologies. He serves as President of Actisound Limited, GTS’s commercial business unit in the United Kingdom, and is charged with managing GTS’s marketing and sales teams, as well as negotiating joint ventures and corporate partnerships.

Steve is also the lead executive responsible for GTS’s and its subsidiaries external communications, financial management, and day-to-day business operations. With more than 20 years of executive and consulting experience, Steve has advised many prominent organizations throughout the United States plan and execute transformational, strategic initiatives. Prior to his work in the private sector, Steve served as the Mayor’s Chief of Staff for the City of Tempe, Arizona.

He has a Bachelor of Arts from the University of Arizona and a Masters in Public Administration from the University of Southern California. Steve is a member of the Leadership Circle at Phoenix Children Hospital, and serves on the International Advisory Counsel of the American Society for Laser Medicine and Surgery (ASLMS). He also represents GTS in the corporate community through organizations such as the Arizona Technology Council, AZBio, and the Greater Phoenix Economic Council.


Vice President, Research & Development

Dr. Barthe has more than 23 years of R&D experience in the medical ultrasound imaging and therapy field. He has led a broad spectrum of activities in the areas of design, development, testing, clinical evaluation, regulatory clearance, and manufacturing for Guided Therapy Systems.

Dr. Barthe has published or presented over 23 technical papers and has been awarded over 29 US and international patents, with over 53 pending. He earned a PhD in Electrical Engineering and a Doctoral Certificate in Acoustical Engineering from the Georgia Institute of Technology and an MS degree in Electrical Engineering from Stanford University.

Dr. Barthe is a member of the Institute of Electrical and Electronic Engineers (IEEE), Acoustical Society of America (ASA), American Institute of Ultrasound in Medicine (AIUM), the American Association for Advancement of Science (AAAS), and the International Society for Therapeutic Ultrasound.


Director, Clinical Support

Rich Amodei has more than 35 years experience in the health care and medical device industry, working for companies including GE Medical Systems and Acuson before joining Guided Therapy Systems as Director, Clinical Support. Rich is responsible for the pre-clinical testing and evaluation of new technologies and provides on-site ultrasonic imaging, training, and support for GTS-sponsored and GTS partner-sponsored clinical studies.

He is a Registered Diagnostic Medical Sonographer and a member of both the American Institute of Ultrasound in Medicine and the Society of Diagnostic Medical Sonographers.


33 South Sycamore Street
Mesa, AZ 85202 USA

phone: 480.649.4399

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