About Us

We are committed to providing our clients with expertise, accuracy, and confidence.

Who we are

LinearPhysics, LLC is a national provider of medical physics consulting services to the radiation oncology market and partners with hospitals and oncology clinics. LinearPhysics’ expertise is the result of many years of clinical experience, including treatment planning and TPS modeling.

We are dedicated to delivering the highest-quality, most accurate, and most comprehensive commissioning and quality assurance services to radiation oncology clinics.

Our physicists are highly trained, board-certified experts who take pride in providing clear communication and instilling confidence in clinical physicists and radiation oncologists.

What we do

 

Over the last 20+ years, we have commissioned more than 120 linear accelerators, including over 80 Varian TrueBeam systems and numerous Siemens and Elekta models. In the collection of data, we have utilized IBA, Sun Nuclear, and PTW scanning systems. We have measured data for Eclipse, Monaco, RayStation, and Pinnacle treatment planning systems.

LinearPhysics works globally, with a primary focus on North America. We hold all required state licenses, including those for Florida, Texas, New York, Massachusetts, North Carolina, South Carolina, Virginia, and Ohio.

  • Rigorous, thorough commissioning methodologies
  • Clear communication at every stage of the project
  • Flexibility in scheduling, with no downtime required from your physicists
  • Extensive experience with all major vendors
  • Complete documentation of results

          Site Locations

          We are centrally located in the United States and provide physics support throughout the country

          Patient safety is our ultimate goal. We provide accurate and tested data producing the most reliable representational model, and deliver confidence to you so you can offer the most accurate treatment to your patients.

          OUR PROMISE

          “I have complete confidence delivering treatments to my patients knowing that Gary and the team at LinearPhysics have ensured our machine is performing accurately and consistently. Their expertise gives me peace of mind that we’re meeting the highest clinical standards and staying fully compliant with evolving state regulations.”

           
           – Eric Boshoven, DVM, Diplomate ACVR (Radiation Oncology)
           

           

          "LinearPhysics was easy to work with from the start. Their personal attention and flexibility gave us the perfect commissioning experience. Our project from shielding, acceptance, commissioning, model validation, and finally end to end testing, gave us the "first day" treatment confidence that we needed."

           
          – Lisa DiBernardi, DVM, Diplomate ACVIM (Oncology), Diplomate ACVR (Radiation Oncology)

          "LinearPhysics has provided exclusive medical physics support to two veterinary radiation treatment centers where I have worked since 2021. I am confident that our linear accelerator calibration, acceptance, plan QA oversight, and any patient-specific concerns are handled promptly and with expert care. Gary is well-versed in the physics of a wide variety of linac models and works closely with our engineering team, both of which I see as key advantages of LinearPhysics compared to other medical physics groups that are not veterinary-specific."

          -Rick Chetney, Jr., DVM, DACVR-RO

          "Without LinearPhysics, we would have faced several challenges that would have delayed our ability to increase caseload over the first year. Now entering our second year of successfully treating cancer patients, we have peace of mind knowing our linac and radiation treatments are being monitored by LinearPhysics. We look forward to our continued partnership with LinearPhysics in the years to come."

          -Kevin Ware, DVM, ACVR-RO

          Our team

          Wm. Gary Shields, MS

          Gary Shields, founder and president of LinearPhysics, earned his master’s degree from the University of Cincinnati in 1995 and achieved ABR Board Certification in Therapeutic Radiologic Physics in 2000.  His experience includes all aspects of clinical physics, dosimetry, patient and machine quality assurance, and regulatory compliance. In addition to his work on the first clinical Halcyon in the US. His work involves close collaboration with clinic administrators, radiation oncologists, and staff to build and maintain seamless, high-functioning radiation oncology departments. Gary has provided physics support all across the United States and internationally, including in Russia, Myanmar, and Colombia. He is dedicated to his family and has a personal desire to provide the best possible care to all cancer patients.

          Michael A. Lamba, PhD

          Mike Lamba is an ABR Board Certified Medical Physicist specializing in Radiation Oncology. He earned his doctoral degree in Nuclear Engineering with a Medical Physics focus from the University of Cincinnati. With extensive experience in implementing advanced radiotherapy technologies, Dr. Lamba has played a leading role as principal physicist in the development of both radiosurgery and proton therapy facilities.  He has contributed to over 30 peer-reviewed publications and has significant expertise in radiation safety and regulatory compliance. His career reflects a strong commitment to innovation and excellence in clinical radiation oncology.

          Carl Shields, PhD

          Carl Shields is a clinical medical physicist with a doctorate from Case Western Reserve University. He has spent the majority of his career in a clinical role at University Hospitals in Cleveland, Ohio, where he supported the delivery of high-quality radiation oncology services. His areas of expertise include linear accelerator calibration, treatment planning system validation, and implementation of advanced techniques such as IMRT, VMAT, and IGRT. Carl brings a strong commitment to clinical precision, safety, and quality assurance in every aspect of patient care.

          Connect with our team

          We’re available to answer questions or schedule a consultation.

          CALL US

          (513) 282-3039

          CONTACT US

          EMAIL US

          info@linearphysics.com