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 for veterinary radiation oncology, supporting both individual clinics and corporate veterinary networks across the United States. Our expertise is built on years of clinical experience in radiation safety, quality assurance, and collaborative support for veterinary oncology teams. We are committed to delivering the highest quality, most accurate, and comprehensive physics support services to veterinary oncology clinics. Our board-certified physicists are highly trained professionals who take pride in clear communication and in providing confidence to the veterinary radiation oncologist and the entire oncology team.

What we do

We are a medical physics group committed to advancing veterinary radiation oncology by applying the highest standards of quality assurance and treatment accuracy standards established in human radiation oncology. With backgrounds in human clinical practice, we bring the same level of precision, diligence, and respect to our work in veterinary settings, ensuring that each clinic and patient receives the same quality of care.

    • Currently, we provide physics services to over thirteen radiation oncology clinics across the United States.
    • With over 10 years of experience in veterinary radiation oncology, we’ve helped establish successful clinics in multiple regions across the US.
    • Backed by over 30 years of human radiation oncology, our team delivers advanced, high-quality physics services for veterinary radiation therapy.
    • Our extensive radiation safety experience has helped clinics enhance protection for staff and patients while consistently meeting regulatory standards.

        Site Locations

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

        To deliver high-quality physics services customized for your veterinary clinic, backed by clear communication, clinical precision, and consistent support throughout.

        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.   Since 2015, he has provided clinical physics services to over 16 veterinary radiation oncology centers across the United States. His work involves close collaboration with clinic administrators, radiation oncologists, and staff to build and maintain seamless, high-functioning radiation oncology departments tailored to the unique needs of veterinary medicine. 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

        EMAIL US

        info@linearphysics.com