about us


We offer experience, quality, and white-glove approach

Our Management

John Zehner and Anwer Rizvi have installed over 50 cyclotrons worldwide, grew early molecular business into larger molecular entity that was acquired in a major business transaction. As partners, they have identified with clients as both clinicians and pharmacists and represent a world-class organization.

John and Anwer represent an elevated level of competencies, sophistication and business acumen in their approach to theranostics – something visible in every aspect of the SpectronRx business. Their expectations of quality, ethics and care are visible in the company’s performance, from the top down – representing a true “white glove”, concierge approach to patient treatment.

Our History

We started as single site in Fishers, Indiana as Nukemed, a provider of unique dispensing and delivery of isotope related solutions for the growing market at that time. Then Nukemed quickly became SpectronRx and expanded to South Bend, Indiana, where there are now 2 facilities. An additional expansion which is under contract, Bunker Hill was developed with a client (Arizona Isotopes) to house a 70 mEV cyclotron, a second such achievement in 70 mEV construction. Growth dictated a central US location to house both research and production facilities. This currently is our corporate headquarters, comprised of 65K sf, with future expansion currently underway for another site in Bunker Hill and the US northeast.

Our Facilities are advanced, and our People are compassionate

Our people and facilities are top-tier – not only producing the best theranostics products in the world, but working as a cohesive, well-synchronized team –  every day of the year, with every project and customer. Our staff knows we exist to bring hope to the patients we serve.

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Our Team


John Zehner

Mr. Zehner brings an unparalleled combination of experience and background to SpectronRx. With 25+ years in medical isotopes. Mr. Zehner is an innovator and has held senior leadership roles in a range of biotech companies in the US and Europe. Mr. Zehner has an extensive background as a Nuclear Pharmacist, his leadership at SpectronRx is a driving force behind our innovation and quality. Mr. Zehner’s background includes various product approvals and extensive experience in the diagnostic and theragnostic molecular isotope field. Mr. Zehner has a broad range of commercial expertise with FDA and NRC regulations. Prior to SpectronRx, John was Chief Operations Officer of Zevacor Molecular, and Co-Founder of Eastern Isotopes (later acquired by IBA).


Anwer Rizvi

Anwer has over 35 years’ experience in the medical isotope innovation space, offering an advanced level of global expertise in the theranostic molecular field. He has served in numerous executive director and shareholder capacity positions and Co-Founded Eastern Isotopes (later acquired by IBA). He went on to become the CEO for IBA Molecular, and steered its success for many years. Anwer has built and managed the development of over 43 cyclotron facilities worldwide. As a well-respected innovator he brings extensive experience in the theranostic molecular field and a broad range of commercial expertise to business development at both the grass roots and global strategic levels of business.

Chief Radiochemist

Dr David Trump

David has over 20 years of experience in many roles in nuclear medicine, including research and development, radiolabeling, manufacturing, quality control, oversight and regulatory submissions. Prior to joining SpectronRx, he developed new radiopharmaceuticals for Spectron mrc and Mayo Clinic. David also holds a Ph.D. in Radiochemistry and Nuclear Pharmacy and teaches nuclear medicine classes at Radiological Technologies University.

VP  of Quality, Regulatory and Technical Compliance

Beth Kraemer

Beth has been a licensed Nuclear Pharmacist in multiple states for over 30 years. She has broad based experience in multiple disciplines within the radiopharmaceutical industry. Her experience includes managing one of the largest global PET manufacturing facilities, functioning as the facility Radiation Safety Officer, performing QA Field Audits in preparedness for FDA inspections across multiple sites, and directing CMC sites in the technical transfer of new biomarkers for external contract manufacturing partners.

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We make a difference in patient’s lives.


Let’s talk. We’d love to understand your needs and help your patients.