Diagnostic Radiation Physics Services (DRPS) provides board-certified medical physicist consulting to healthcare facilities throughout Fairfax and the surrounding Northern Virginia region. Fairfax — including the independent City of Fairfax and the broader Fairfax County — sits at the center of one of the most healthcare-dense corridors in the country, bordered by Arlington County, Loudoun County, and Prince William County, with the independent cities of Alexandria, Falls Church, Manassas, and Manassas Park within the same geographic area. This concentration of imaging centers, outpatient radiology practices, and integrated health systems demands physics expertise that spans multiple jurisdictions and regulatory frameworks. DRPS serves that need across the full Northern Virginia region and the wider Washington DC metro area, including facilities in Maryland and the District of Columbia.
Medical Physics Services in Fairfax
DRPS delivers the full scope of diagnostic medical physics support that Fairfax-area facilities require, from routine compliance testing to complex shielding projects:
- Equipment Performance Evaluations (EPEs) — Comprehensive acceptance testing and annual surveys for radiographic, fluoroscopic, CT, and mammography units, documented to satisfy VDH registration requirements and accreditation standards.
- Radiation shielding design and certification — Barrier calculations, construction drawing review, and post-installation surveys for new construction, renovation, and equipment upgrades, including high-workload CT suites and interventional labs.
- Radiation Safety Officer (RSO) services — Named RSO support, license compliance management, personnel dosimetry oversight, leak testing, and staff training for facilities licensed under Virginia's radioactive material program.
- Accreditation support — Preparation and physicist reporting for ACR, IAC, RadSite, and Joint Commission accreditation programs, including image quality review and phantom dosimetry.
- CT physics testing and optimization — Protocol review, dose index benchmarking, image quality optimization, and ACR CT accreditation phantom surveys.
- PET/CT and nuclear medicine physics — Acceptance testing, calibration verification, and ongoing QA for PET/CT systems and gamma cameras under Virginia radioactive material licensing.
- Comprehensive QA programs — Custom quality assurance protocols and schedules tailored to facility workflow, equipment inventory, and accreditation obligations.
Virginia Radiation Regulations
Imaging and nuclear medicine facilities operating in Fairfax are regulated by the Virginia Department of Health (VDH), Office of Radiological Health. Virginia became an NRC Agreement State on March 31, 2009, meaning radioactive materials — including PET radiopharmaceuticals, sealed sources, and other licensed materials — are licensed directly by VDH rather than by the NRC. X-ray producing machines are registered with VDH separately from radioactive material licenses.
VDH administers Virginia's Agreement State program for radioactive materials and the statewide registration of X-ray machines. Facilities must comply with VDH regulations governing license conditions, inspection readiness, and personnel qualification, alongside federal standards including MQSA for mammography, ACR technical standards, and Joint Commission imaging service requirements where applicable.
DRPS maintains current working knowledge of VDH regulatory requirements and has experience supporting facilities through initial licensing, license amendments, inspection preparation, and corrective action responses across the Commonwealth.
Why Fairfax Facilities Choose DRPS
Multi-jurisdictional expertise. Fairfax-area health systems frequently operate facilities across Virginia, Maryland, and the District of Columbia. DRPS serves facilities under all three regulatory frameworks — VDH in Virginia, the Maryland Department of the Environment in Maryland, and the District of Columbia's radiation control authority — providing a single qualified physics resource across the metro footprint.
Board-certified, credentialed physicists. DRPS physicists hold certification from the American Board of Radiology (ABR) in diagnostic medical physics, satisfying credentialing requirements for ACR accreditation, Joint Commission compliance, and VDH radioactive material licensing.
Responsive, regional service. Northern Virginia's density of imaging sites means facilities need physics support that arrives on schedule and delivers documentation without delays. DRPS structures engagements to meet facility timelines, including time-sensitive accreditation deadlines and equipment-installation acceptance testing windows.
Broad modality and service coverage. A single DRPS engagement can address EPEs, shielding design, RSO services, and accreditation physics reporting — eliminating the coordination overhead of managing multiple physics vendors across a facility's imaging portfolio.
Frequently Asked Questions
Do Fairfax imaging facilities need a radiation physicist on staff, or can they use a consultant? Most outpatient imaging centers and smaller hospital radiology departments contract with an outside board-certified medical physicist rather than employing one directly. Virginia does not require an in-house physicist, and ACR, IAC, and Joint Commission accreditation programs accept qualified consulting physicists who meet their credentialing criteria. DRPS provides consulting physicist services that satisfy those requirements.
Who regulates X-ray machines in Fairfax, Virginia? X-ray machines in Virginia — including radiographic, fluoroscopic, CT, mammography, and dental units — are registered with the Virginia Department of Health, Office of Radiological Health. Facilities must maintain current registrations and comply with VDH inspection standards. DRPS can assist with registration review, deficiency responses, and documentation of corrective actions.
Does the City of Fairfax have different radiation regulations than Fairfax County? No. The City of Fairfax is an independent city but falls under the same Virginia Department of Health regulatory framework as Fairfax County and all other Virginia jurisdictions. VDH regulations apply statewide regardless of county or city boundaries.
What is an Agreement State, and why does it matter for radioactive material licenses in Virginia? An Agreement State is one that has entered into a formal agreement with the NRC to regulate the use of byproduct, source, and certain special nuclear material within the state. Virginia has been an Agreement State since March 31, 2009. This means that facilities in Fairfax using licensed radioactive materials — such as PET radiopharmaceuticals or brachytherapy sources — must hold a VDH radioactive material license, not a license issued by the NRC. DRPS has experience supporting both new license applications and ongoing compliance under VDH's Agreement State program.
Does DRPS serve facilities beyond Fairfax County — Arlington, Loudoun, Prince William, and nearby independent cities? Yes. DRPS provides medical physics services throughout Northern Virginia, including Arlington County, Loudoun County, Prince William County, and the independent cities of Alexandria, Falls Church, Fairfax, Manassas, and Manassas Park, as well as the broader Washington DC metro area across Maryland and DC.