MRI Physics Testing & ACR MRI Accreditation
Annual MRI equipment performance evaluations and ACR MRI accreditation support by board-certified medical physicists in FL, MD, VA, DC, CA, NV, PA, NY, NJ, and DE.
What's included
Annual MRI Equipment Performance Evaluation
Comprehensive physicist survey of MRI system performance, image quality, and safety per ACR and state requirements
ACR MRI Phantom Testing — All Seven Tests
Full ACR MRI phantom protocol covering geometric accuracy, high-contrast resolution, slice thickness, slice position, image intensity uniformity, percent signal ghosting, and low-contrast detectability
Weekly Technologist vs Annual Physicist QC Review
Review and documentation of technologist weekly QC records; physicist-level annual testing to complement the ongoing program
MRI Safety Program Support
MRI safety zone documentation review, screening procedure support, and MRI safety officer consultation
Why it matters
- ACR MRI accreditation readiness with complete physicist documentation
- Baseline performance records that distinguish equipment drift from clinical technique issues
- Clear differentiation between technologist QC responsibilities and annual physicist testing requirements
- MRI safety program documentation aligned with ACR and Joint Commission expectations
Designed for
What is an MRI equipment performance evaluation?
Although MRI does not use ionizing radiation, regulatory bodies and accreditation organizations require periodic equipment performance testing to ensure image quality and patient safety. The ACR MRI Accreditation Program requires an annual medical physicist evaluation using the ACR MRI phantom protocol. The Joint Commission and many state regulations reference ACR accreditation status as part of imaging facility oversight.
DRPS board-certified medical physicists perform annual MRI evaluations and provide the documentation facilities need for ACR accreditation, state surveys, and Joint Commission reviews.
What we measure
ACR MRI phantom — the seven tests
The ACR MRI phantom protocol comprises seven distinct measurements performed on each relevant coil and field strength:
- Geometric accuracy — dimensional accuracy of phantom images across multiple orientations
- High-contrast spatial resolution — limiting resolution in frequency- and phase-encode directions
- Slice thickness accuracy — verification of prescribed vs. actual slice thickness
- Slice position accuracy — alignment of slice positioning relative to phantom landmarks
- Image intensity uniformity — percent integral uniformity across the phantom image
- Percent signal ghosting — ghost artifact quantification in phase-encode direction
- Low-contrast object detectability — detection of low-contrast spokes at multiple diameters
Equipment performance
Magnetic field homogeneity documentation, gradient performance assessment, signal-to-noise ratio benchmarking, and artifact characterization.
Safety checks
RF shielding integrity review, MRI safety zone access controls, quench pipe and ventilation status, and documentation of zone signage.
Services
Annual MRI equipment performance evaluation
A full physicist survey meeting ACR and applicable state requirements, including the complete ACR MRI phantom protocol, written report with pass/fail criteria, and corrective-action recommendations.
ACR MRI accreditation support
Phantom image acquisition, all seven ACR tests, clinical image review, and coordination of the physicist component of your ACR MRI accreditation or reaccreditation submission.
Weekly technologist QC program review
Review of your facility's technologist-level weekly QC records; identification of trending issues; and recommendations for corrective action where performance thresholds are approached or exceeded.
MRI safety program support
Review of MRI safety zone designations (Zones I–IV), patient and staff screening procedure documentation, ferromagnetic detection system review, and consultation on policy gaps flagged by The Joint Commission or ACR.
Service area
DRPS serves MRI facilities in Florida, Maryland, Virginia, Washington DC, California, Nevada, Pennsylvania, New York, New Jersey, and Delaware. Remote report review and program consultation are available nationally.
Regulatory framework
MRI physics testing at DRPS is performed in accordance with:
- ACR MRI Accreditation Program requirements
- ACR MRI Phantom Testing Guidance
- ACR Manual on MR Safety (Kanal et al.)
- The Joint Commission medical-physics and imaging standards
- State radiation-control and imaging facility regulations in each service state
FAQ
Is MRI physics testing required even without ionizing radiation?
Yes. ACR MRI accreditation — which many payers and state programs require or strongly prefer — mandates an annual medical physicist evaluation. The Joint Commission also references MRI equipment performance in its imaging standards.
What coils and field strengths do you test?
We test the body coil and the primary surface/array coils used for clinical imaging. Testing is performed at the field strength(s) in clinical use. Multi-field-strength scanners require testing at each field strength.
How long does an annual MRI physicist evaluation take?
Most single-scanner evaluations require two to four hours of scanner time, plus report preparation. We schedule around your clinical workflow to minimize downtime.
What is the difference between technologist weekly QC and the annual physicist evaluation?
Technologist weekly QC monitors key image quality parameters on a routine basis and is designed to detect acute changes between physicist visits. The annual physicist evaluation is a more comprehensive assessment covering all ACR phantom tests, equipment performance, and safety checks. Both are required for ACR accreditation.
Do you support MRI safety officer functions?
DRPS can provide consultation on MRI safety zone design, screening procedures, and policy documentation. For facilities requiring a designated MRI safety officer role, we can discuss appropriate engagement structures.
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Ready to get started?
Talk to a board-certified medical physicist about your facility's needs.