Radiofrequency (RF) Generators, Electrodes, and Cannulas for Pain Management and Neurosurgery - Cosman Medical

Radiofrequency for Pain Management and Neurosurgery      

Tel: +1 781 272 6561   Fax: +1 781 272 6563      

Who We Are


Michael A. Arnold, PhD


Michael Arnold received a bachelor’s degree in Chemistry, and a doctoral degree in Nutritional Biochemistry and Metabolism at the Massachusetts Institute of Technology. His doctoral research was in the field of neuroendocrinology, and focused on the central control of growth hormone secretion. Dr. Arnold’s postdoctoral training included two years at Harvard Medical School as a Research Fellow in Neurology. His research was conducted in the laboratory of Joseph B. Martin, MD, PhD, the Head of Neurology at Harvard and at the Massachusetts General Hospital. Dr Arnold’s postdoctoral research focused on β-endorphin, a naturally occurring opioid-like brain peptide that modulates pain perception.

From 1981 to early 2000, Dr. Arnold held several senior management positions at Radionics, Inc.  He led development teams that led to the successful launch several product lines including epilepsy recording electrodes and hydrocephalus products. Other key company positions held by Dr. Arnold included Director of Regulatory Affairs and Quality Assurance, Director of Sales and Marketing, and President of Radionics Medical Products, a division of Radionics, Inc.  Dr. Arnold’s extensive experience in product development, regulatory affairs, and sales and marketing (both USA and international) will help position Cosman Medical for continued growth into the future.

Curriculum Vitae and Publications...


Enrico Cohen

Vice President for Sales for Europe, Middle East, Africa

Enrico Cohen has over 20 years of experience in the medical device industry, focusing on RF pain mangement and minimally invasive surgery (MIS). He brings comprehensive clinical and technical knowledge to his role in clinical support, educational support, technical innovation, and sales management. Mr. Cohen's experience in radiofrequency pain managment and neurosurgery spans a decade, starting with his role as General Sales Manager for Cotop International (2000-2007). In 2007, he founded CoMedical BV, a premier distributor of pain management products and publisher of medical textbooks. In 2009, he became Cosman's sales manager for the EMEA, and Cosman's distributor in the Netherlands, Belgium, and Luxemburg. His experience in MIS includes his roles as Senior Product Specialist in Neuromodulation St. Jude Medical (ANS, 2007-2008), General Sales Manager for CoTT BvBa Antwerpen-Amsterdam for M.I.S. and Pain Management (1994-2000), and Product Specialist and Regional Sales Manager for Olympus Endoscopy (1987-1994). Mr. Cohen has been a competitive waterskiier since the 1970's, holding numerous international titles in the standard, barefoot, and barefoot jump divisions, and having coached nine European champions, several national and regional champions, five World Champions, and several World Record holders.

Curriculum Vitae...

Michael Bryant

Michael Bryant

Vice President for Sales for Asia Pacific

Michael Bryant has a 25-year history in the medical device business, focused on sales and promotion for radiofrequency generators and neurosurgical equipment. Michael’s association with the Cosman and Arnold-led management teams started in 1987, and for him the association has been a very rewarding one selling outstanding medical technology. In 1990 Michael Bryant started a medical distribution business in Australia and New Zealand, named TaylorBryant Pty Ltd, with the key product lines produced by Radionics, Inc. Radionics very quickly achieved a dominant position in radiofrequency generators, stereotactic frames, radiosurgical systems, and image guidance systems in the Australian and New Zealand markets. This had a major impact on the medical technology purchased in other Asian markets, due to the influence of numerous Australian physicians willing to travel and teach. Today, Australian physicians continue to foster very good working relationships with many leading Pain Management specialists and Neurosurgeons in Asia and in the USA. In 2006 Michael sold his business to a private Australian equity group. That entity formed a new company called Life Healthcare Pty Ltd., for which Michael was General Manager until 2011. Michael holds several university degrees in physics, chemistry and mathematics, and has outstanding business and management experience in the medical industry, which he intends to use to help grow Cosman Medical's business in the Asia-Pacific region.

Curriculum Vitae...

Eric Richard Cosman, Jr, PhD

Eric R. Cosman Jr, PhD

Scientific Director

In his role as Scientific Director, Eric Cosman, Jr, conducts research on the physical and biological mechanisms of Radiofrequency (RF) in pain management, as well as their translation into clinical practice.  Among his academic publications are seminal reports on the electric and thermal effects of RF and Pulsed RF, including the discovery of Pulsed RF heat flashes and characterization of Bipolar RF heat lesion geometry.  He has been invited to speak at international pain conferences, medical schools, and prominent hospitals.  Dr. Cosman is also the chief designer of the G4 four-electrode radiofrequency generator.

Dr. Cosman received bachelors, masters, and doctoral degrees in Electrical Engineering and Computer Science at the Massachusetts Institute of Technology (MIT).  His doctoral research focused on the inference of neural networks in humans based on functional neuroimaging data, such as fMRI, MEG, and EEG.  His work was conducted in collaboration with the Surgical Planning Lab (SPL) and the Brigham and Women's Hospital and with the Athinoula A. Martinos. Center for Biomedical Imaging at the Massachusetts General Hospital (MGH).

Curriculum Vitae and Publications...


Eric R. Cosman Sr, PhD


Eric Cosman, Sr, is a Professor of Physics, Emeritus at the Massachusetts Institute of Technology (MIT). Dr. Cosman received a bachelor’s degree in Mathematics (1963) and a doctoral degree in Physics (1966), both from MIT.  His early research career focused on nuclear physics including nuclear reactions, isobaric analog and shape-isomeric nuclear states.  Later his research transitioned to biomedical physics. Dr. Cosman supervised the Bachelors, Masters, and Ph.D. theses of numerous students at MIT during his active years as Professor from 1966 until 1991.  From 1969 until 1991 he was also Scientific Director of Radionics, Inc. In 1991 he became Professor Emeritus, and in the same year succeeded his father, Bernard Cosman, as President and CEO of Radionics. In the year 2000 he sold Radionics to Tyco, Inc. Throughout these years, Dr. Cosman was the world’s leading authority on radiofrequency generation in medicine, intracranial pressure sensors and models, stereotactic methods, and radiosurgery. He invented and developed numerous techniques and instruments in these fields, including dozens of models of RF generators and electrodes for neurosurgery, pain therapy, and tumor ablation, the Cosman-Roberts-Wells (CRW) which is the world’s leading stereotactic frame in neurosurgery, and pioneering mechanical and software applications in stereotactic radiosurgery and image guided navigation. In 2004, he founded Cosman Medical to advance radiofrequency technology in pain management and neurosurgery. Professor Cosman is the author of over 100 scientific publications in Nuclear Physics and Biomedical Physics, and the author of over 150 U.S. and foreign patents and patent applications.

Curriculum Vitae and Publications...

Bernard Johnson Cosman, MS

Bernard J. Cosman, MS

Historical Figure (1914-1993)

Bernard J. Cosman is the inventor of the first radiofrequency generator used in medicine, and the founder of Radionics, Inc., the world leader in RF medicine until its sale in 2000. In the early 1950s, he worked with Dr. William H. Sweet, MD, Chief of Neurosurgery at the Massachusetts General Hospital (MGH) to develop the RF generator for lesioning in the deep brain for the treatment of obsessive compulsive and other mood disorders. In 1952, he designed and built the first commercial RF lesion generator, the Radionics RFG-2. Mr. Cosman also developed the first impedance monitor for use with medical radiofrequency generators, the Radionics IM-1, and the first RF generator with a built-in nerve stimulation (Radionics RFG-3A). At Radionics, Mr. Cosman engineered numerous models of RF generators that were used by tens of thousands of physicians around the world. These generators include the RFG-2, RFG-3A, RFG-3AV, RFG-5, and RFG-6. Working with Drs. Sweet, Ballantine, Rosomoff, Tew, Shealy, Zervas, and his son, Professor Eric Cosman, Bernard Cosman also created numerous pioneering electrode systems for stereotactic and percutaneous techniques, notably for percutaneous cordotomy, trigeminal neuralgia, facet denervations, and hypophysectomy.

Bernard Cosman’s brilliant engineering talents led to frontier developments in many other areas of medicine. In 1937, after receiving his bachelors and masters degrees in Electrical Engineering from the Massachusetts Institute of Technology (MIT), he built the first accelerator based million volt x-ray generator for radiation treatment of cancer with MIT Professors John Trump and Robert Van de Graaff. It was the progenitor of the modern radiation generators of the linear accelerator type (LINACS).  In the 1940s through the 1960s, he designed the most popular high-frequency bipolar coagulators, a technology that is among the most common seen in today’s operating rooms.  During World War II, he was a leading scientist in the Ultrasonic Laboratory at MIT, developing submarine SONAR systems, work that involved some hazardous active testing in the Pacific theater. He was also a lead engineer at MIT’s Lincoln laboratory and in the Harvey Radio Laboratory, constructing the world’s most powerful radio transmitters. This work led to his development in 1950 of one of the first trackless ultrasonic lesion generators for neurosurgery with Dr. Thomas Ballantine at the MGH, a technology that is still very active today.

Curriculum Vitae and Publications...