Diagnostic Radiography (X-ray) Physics Testing
Diagnostic radiography equipment performance evaluations, exposure index review, and X-ray registration management by board-certified medical physicists in FL, MD, VA, DC, CA, NV, PA, NY, NJ, and DE.
What's included
Diagnostic Radiography Equipment Performance Evaluation
Annual physicist testing of general X-ray (DR and CR) systems covering dose, image quality, and equipment performance per state radiation-control requirements
Digital Radiography Exposure Index Review
Review of DR exposure index targets, deviation index trending, and AAPM TG-116 / IEC 62494-1 alignment across your imaging systems
X-ray Machine Registration Management
Annual X-ray registration support — documentation, renewal coordination, and physicist attestation for state radiation-control programs
Acceptance Testing for New X-ray Systems
Pre-clinical baseline evaluation and performance documentation for newly installed radiographic equipment
Why it matters
- State radiation-control compliance with timely annual evaluation reports
- Standardized exposure index targets that reduce retakes and unnecessary patient dose
- Clear registration renewal documentation for every X-ray source in your facility
- Written physicist report suitable for state inspectors and accreditation reviewers
Designed for
What is diagnostic radiography physics testing?
Diagnostic radiography — general X-ray imaging — is the most widely used modality in diagnostic imaging. State radiation-control programs require periodic equipment performance evaluations for all registered X-ray sources, and annual registration renewals typically require current physicist documentation. As facilities have transitioned to digital radiography (DR) and computed radiography (CR), managing exposure indices has become a key quality indicator: overexposed images waste patient dose, while underexposed images degrade diagnostic quality.
DRPS board-certified medical physicists evaluate radiographic system performance, review digital radiography exposure indices, and support the annual X-ray registration process across all service states.
What we measure
Radiation output and dose
X-ray tube output (mR/mAs), output reproducibility and linearity, HVL (beam quality), and entrance skin exposure estimation for reference techniques.
Image quality
Limiting spatial resolution, contrast resolution, noise, and artifact assessment for digital detector systems (flat-panel DR and CR phosphor plate).
Equipment performance
kVp accuracy and reproducibility, timer accuracy, AEC (phototimer) performance, collimation and field-size accuracy, SID indicator accuracy, and grid alignment.
Digital radiography exposure index
Review of exposure index (EI) and deviation index (DI) targets against the AAPM TG-116 / IEC 62494-1 framework; identification of outlier exposures and trending patterns; recommendation of EI targets by room, view, and patient population.
Services
Annual radiographic equipment performance evaluation
A full physicist evaluation of general X-ray rooms per state radiation-control requirements, with a written report covering radiation output, image quality, equipment performance, and AEC calibration.
Digital radiography exposure index review
Assessment of your facility's current EI/DI targets and monitoring practices, including trending review, outlier identification, and recommendations aligned with AAPM TG-116 and IEC 62494-1 guidance.
X-ray machine registration management
Annual registration support for each X-ray source — documentation preparation, physicist attestation where required by state, renewal tracking, and coordination with the state radiation-control program.
Acceptance testing for new radiographic systems
Pre-clinical baseline performance evaluation for newly installed DR flat-panel or CR systems, with documentation of manufacturer specification compliance and establishment of initial EI targets.
Service area
DRPS serves diagnostic radiography facilities in Florida, Maryland, Virginia, Washington DC, California, Nevada, Pennsylvania, New York, New Jersey, and Delaware. Remote consultation and record review are available nationally.
Regulatory framework
Diagnostic radiography physics testing at DRPS is performed in accordance with:
- State radiation-control program regulations in each service state (FL, MD, VA, CA, NV, PA, NY, NJ, DE)
- AAPM TG-116 (Optimization of Image Quality and Patient Dose in Digital Radiography) — used as a professional reference framework for exposure index review
- IEC 62494-1 (Medical Electrical Equipment — Exposure Index of Digital X-ray Imaging Systems)
- ACR–AAPM technical standards for diagnostic radiography as applicable
- Facility-specific state X-ray machine registration requirements
FAQ
How often do general X-ray rooms need a physicist evaluation?
Most state radiation-control programs require annual evaluations. Requirements vary by state and by equipment type — DRPS confirms applicable requirements for each facility at the time of engagement.
What is the exposure index (EI), and why does it matter?
The exposure index is a standardized number reported by digital radiography detectors that indicates the amount of radiation received by the detector for a given image. Facilities that set appropriate EI targets and monitor deviation indices (DI) can systematically reduce repeat exposures, lower unnecessary patient dose, and maintain consistent image quality across shifts and operators. DRPS uses the AAPM TG-116 and IEC 62494-1 frameworks as professional references to guide this work.
Do you handle X-ray machine registration with the state?
Yes. DRPS supports annual X-ray registration renewals — tracking registration due dates, preparing documentation, coordinating physicist attestation where required, and submitting to the relevant state radiation-control program on your behalf or in coordination with your team.
We are adding a new DR flat-panel system. Do we need acceptance testing?
Yes — acceptance testing before clinical use establishes a performance baseline, confirms the system meets manufacturer specifications, and provides the initial EI targets your technologists need. State regulations in several of our service states also require physicist evaluation before new X-ray equipment is put into clinical service.
Can you support multi-site facilities with many X-ray sources?
Yes. DRPS routinely manages annual evaluation scheduling and registration tracking for facilities with large inventories of X-ray equipment across multiple locations.
Related
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Talk to a board-certified medical physicist about your facility's needs.