CT Physics Testing & Equipment Performance Evaluation — Board-Certified Medical Physicist

What is CT physics testing?

CT physics testing is the annual (and as-needed) evaluation of a CT scanner's radiation dose, image quality, equipment performance, and safety. Regular testing keeps scanners operating within specification and keeps your facility inspection- and accreditation-ready.

DRPS performs CT equipment performance evaluations (EPEs) for both conventional diagnostic CT and cone-beam CT systems, with documentation formatted for state radiation-control programs and ACR accreditation.

What we measure

Radiation dose

CTDIvol, DLP, and size-specific dose estimate (SSDE) measurements, with protocol-level dose assessment and concrete recommendations for dose reduction where appropriate.

Image quality

Spatial and contrast resolution, noise, uniformity, low-contrast detectability, and artifact assessment using ACR-accepted phantoms.

Equipment performance

Table movement accuracy, gantry tilt, laser alignment, collimation accuracy, and tube-current modulation behavior.

Safety

Interlocks, AEC performance, collimation verification, and patient-positioning checks.

Services

Annual performance evaluation

A complete ACR/state-compliant report covering dose, image quality, equipment performance, and safety in one visit.

Cone-beam CT evaluation

Equipment performance testing for cone-beam CT systems used in interventional, dental, and orthopedic imaging.

Dose optimization

Protocol-by-protocol review with phantom validation and clinical image sign-off — reduce dose without compromising diagnostic quality.

Image quality optimization

Reconstruction tuning, contrast timing, and artifact reduction for challenging protocols.

ACR CT accreditation support

ACR-CTAP testing, image-quality reviews, and full submission-package preparation.

Ongoing QA

Monthly QA testing, dose monitoring, and protocol review — everything state regulators and accreditation programs expect between annual visits.

Regulatory framework

Testing is performed to state radiation-control requirements (FL, MD, VA, DC, CA, NV, PA, NY, NJ, DE), ACR-CTAP, Joint Commission medical-physics standards, and applicable FDA equipment requirements.

Service area

DRPS serves CT facilities across Florida, Maryland, Virginia, Washington DC, California, Nevada, Pennsylvania, New York, New Jersey, and Delaware.

FAQ

How often does a CT need physics testing?

Annually for the comprehensive evaluation, plus testing after major service, tube replacement, or significant protocol changes.

What's in a standard CT evaluation?

Dose measurements (CTDIvol, DLP, SSDE), image-quality phantom testing, equipment-performance checks, safety verification, and a compliance report suitable for state and ACR submission.

Do you test cone-beam CT?

Yes — cone-beam CT EPEs in addition to conventional diagnostic CT.

Can you optimize our protocols?

Yes — dose analysis, optimized protocol drafts, phantom validation, and clinical review.

Do you handle ACR CT accreditation?

End to end — physics testing, image QC review, documentation, and submission coordination.

What happens if a scanner fails a test?

You receive a specific remediation plan. We coordinate with your service vendor until the system passes.

Related services

• ACR Accreditation Support — multi-modality ACR accreditation packages
• Diagnostic Radiography Physics — radiographic X-ray equipment performance evaluations
• Fluoroscopy Physics Testing — fluoroscopy equipment performance and dose assessment
• Radiation Shielding Design — CT room shielding calculations and post-installation surveys
• Contact DRPS — schedule a CT physics evaluation