PET/CT image quality
Understanding NEMA Sensitivity in PET/CT: Why It Matters for Image Quality and Patient Care
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What Is NEMA Sensitivity in PET/CT Imaging?
In molecular imaging, NEMA sensitivity refers to the standard method for evaluating PET scanner performance, as defined by the National Electrical Manufacturers Association (NEMA). This benchmark allows providers and manufacturers to assess how efficiently PET/CT systems detect true signals while minimizing noise and scatter.
Since each PET/CT system has unique hardware, NEMA sensitivity enables apples-to-apples performance comparisons. Leading OEMs like GE HealthCare continue to innovate in this area — delivering scanners that meet or exceed these industry standards.
Are you interested in bringing NEMA-compliant technology to your facility? Explore Mobile PET/CT Imaging Solutions from Shared Medical Services.
How NEMA Sensitivity Impacts PET/CT Performance
Systems with higher sensitivity ratings consistently deliver better clinical outcomes. According to multiple studies, the key advantages include:
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- Improved Image Quality – Better signal-to-noise ratio leads to sharper, more detailed images
- Faster Scan Times – Shorter acquisitions reduce patient discomfort and motion artifacts
- Lower Radiation Dose – Maintain image integrity while minimizing radiation exposure
PET/CT system performance is evaluated using NEMA standards to measure:
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- Spatial resolution and lesion detectability
- Noise-equivalent counting rate (NECR)
- Scatter fraction and count rate accuracy
- Reconstruction algorithms and contrast recovery
One study by Hsu DFC, et al. (2017) demonstrated that next-gen time-of-flight PET/CT systems with silicon photomultipliers offered significantly improved NEMA metrics (read study).
How NEMA Sensitivity Benefits the Patient Experience
Patients often associate PET/CT with long scans and radiation exposure — two concerns that directly affect comfort and compliance. Higher NEMA sensitivity helps mitigate both by:
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- Reducing scan times — Less time on the table means improved comfort
- Lowering radiation dose — Especially valuable for patients requiring multiple scans
- Preserving image quality — Even at lower doses or with faster acquisition protocols
Learn how Mobile Imaging Services from SMS deliver PET/CT systems engineered for optimal NEMA performance and patient-centered care.
Lesion Detection and Diagnostic Accuracy
Higher scanner sensitivity isn’t just about comfort — it also translates to better lesion visibility and more confident diagnoses. Research has shown that high-sensitivity PET/CT systems provide:
- Earlier detection of small lesions
- Greater accuracy in Standard Uptake Values (SUVs)
- Improved cancer staging and treatment planning
According to a comparative study by Oddstig et al. (2019), SiPM-based PET/CT systems consistently outperformed conventional detectors in both image quality and diagnostic performance (view full article).
Stay Ahead in PET/CT Imaging Technology
As PET/CT innovation accelerates, NEMA sensitivity benchmarks will continue to shape the industry. Shared Medical Services delivers mobile PET/CT solutions that meet — and often exceed — these standards, giving healthcare providers confidence in image quality, scan time, and safety. Whether you’re planning a new deployment or need interim capacity, our mobile PET/CT systems are built to support excellence in diagnostics.
Media Contact:
Blake Kenney
Senior Marketing Specialist
Shared Medical Services, Inc.
Phone: (608) 910-1332
Email: contactsms@sharedmed.com