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GE vs Siemens Refurbished PET/CT Scanners: A Buyer's Comparison Guide

April 9, 2026 · 6 min · Medical Imaging Specialists

GE Discovery PET/CT listing photo for comparison planning.
In this guide

Practical considerations, risk points, and what to ask before you buy, service, move, or maintain imaging equipment.

If you’re in the market for a refurbished PET/CT scanner, you’ve probably narrowed your search to two names: GE Healthcare and Siemens Healthineers. These two OEMs dominate the pre-owned PET/CT market, each offering systems with distinct strengths depending on your clinical volume, patient mix, and budget.

This guide breaks down the key differences between refurbished GE and Siemens PET/CT scanners so you can make a confident, informed purchasing decision.

Why PET/CT — and Why Refurbished?

PET/CT imaging combines the metabolic sensitivity of positron emission tomography with the anatomical detail of computed tomography. It’s the gold standard for oncology staging, treatment response monitoring, and cardiac viability studies. For facilities expanding into molecular imaging or replacing aging equipment, a refurbished PET/CT scanner offers access to proven clinical technology at 40–60% below new system pricing.

Both GE and Siemens have long track records in this space, and their refurbished units are widely available with solid parts support — making either brand a viable option for most buyers.

GE PET/CT Systems: What to Know

GE’s PET/CT lineup includes the Discovery series, which has been a workhorse in oncology imaging for over a decade. Common refurbished models include:

GE strengths:

Considerations:

Siemens PET/CT Systems: What to Know

Siemens has been a strong competitor in PET/CT, particularly with its Biograph series. Common refurbished models include:

Siemens strengths:

Considerations:

Head-to-Head: Key Comparison Points

Detector Technology

This is the single biggest differentiator on older systems. Siemens adopted LSO crystals early, giving even their older Biograph units faster photon detection and better timing resolution. GE’s older Discovery systems use BGO, which is reliable but slower. On newer platforms (GE Discovery 690 and later vs. Siemens Biograph mCT), both manufacturers offer LYSO/LSO-based TOF systems and the performance gap narrows significantly.

Bottom line: If you’re buying an older, budget-friendly refurbished PET/CT, Siemens’ LSO advantage matters. At the TOF tier, both brands deliver excellent PET image quality.

CT Component

Both manufacturers pair their PET systems with capable CT scanners. GE’s Discovery line often uses their BrightSpeed or LightSpeed CT platforms, while Siemens integrates Sensation or Definition-series CT technology into the Biograph. For most PET/CT applications, the CT is used primarily for attenuation correction and anatomical localization, so a 16-slice CT is typically sufficient. If you need the CT for standalone diagnostic work, look at 40-slice and above configurations.

Throughput and Sensitivity

Facilities running high patient volumes should prioritize PET sensitivity and axial field of view. Siemens TrueV-equipped systems and GE’s Discovery IQ offer extended axial coverage. For standard clinical volumes (8–12 patients per day), most mid-tier refurbished systems from either brand will perform well.

Service and Parts Availability

GE’s enormous installed base gives it an edge in parts availability and independent service options. Discovery ST and STE parts are plentiful and competitively priced. Siemens Biograph parts are available but often come at a premium, particularly for mCT-specific components. When evaluating total cost of ownership, factor in not just the purchase price but ongoing parts and service costs for the specific model you’re considering.

Software and Reconstruction

Both OEMs offer advanced reconstruction options, but software licensing and upgrade availability vary by model and by whether you’re buying from an OEM-certified refurbished program or an independent reseller. Ask your vendor specifically about what software packages are included and what additional licenses may be needed for your clinical applications.

Which System Is Right for Your Facility?

Choose a refurbished GE PET/CT if:

Choose a refurbished Siemens PET/CT if:

Either brand works well if:

Make the Right PET/CT Investment

A refurbished PET/CT scanner is a major capital decision — often $300,000 to $900,000+ depending on configuration and age. The right choice depends on your clinical needs, patient volume, service infrastructure, and long-term budget.

Medical Imaging Specialists has been buying, refurbishing, and supporting PET/CT, CT, and MRI systems since 2004. We maintain in-house parts inventory, employ experienced field service engineers, and work with facilities across the U.S., Caribbean, and Latin America. Whether you’re comparing specific models or just starting your search, our team can help you evaluate your options and find the right system for your facility.

Contact Medical Imaging Specialists →

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