For hospitals and imaging centers, the main medical CT makers are Siemens Healthineers, Canon Medical, GE HealthCare and Philips, and each sells photon-counting or spectral flagships alongside general-purpose scanners; Siemens, GE and Philips also run refurbished programs. The right choice depends on your exam mix (cardiac, stroke, oncology, general), room and power limits, service coverage in your area, and total cost over the life of the system, not the sticker price alone.
This guide is for hospital administrators, imaging directors and outpatient center owners planning a CT purchase or replacement. It covers medical scanners from the four main makers, not industrial inspection systems.
Fit matters more than the newest spec sheet. Your exam mix decides whether you need photon-counting, spectral or a wide-coverage detector, while room limits, local service coverage and software licensing drive what the scanner costs over its life. No maker publishes prices, so expect to compare quotes.
Below you will find each maker's flagship line and refurbished program side by side, a checklist for choosing, a new versus refurbished comparison, a total cost model, and a plain explanation of photon-counting and spectral CT.
Company reviews
Best for photon-counting CT you can buy today: Siemens
- Flagship line
- NAEOTOM Alpha class
- Photon-counting or spectral
- Photon-counting
- Refurbished program
- ecoline
Why we picked it. Siemens Healthineers has the broadest photon-counting lineup among these makers, with three NAEOTOM models, and also sells conventional SOMATOM scanners and a large refurbished catalog. That range lets one vendor cover a flagship room and smaller outpatient sites.
More details, pros and cons
Pros
- Three photon-counting models, including a single-source option
- Wide conventional SOMATOM range
- Large ecoline refurbished catalog
- Mobile head CT option
Cons
- Pricing is not published
- Photon-counting systems carry flagship cost and site requirements
- Some software features may be add-ons, so confirm what is included
Skip it if: Your exam mix is routine and a mid-range scanner from your current service vendor would be cheaper to run.
More about Siemens
Siemens Healthineers is synonymous with top-tier engineering and premium diagnostic performance. By leveraging dual-source technology and innovative photon-counting detectors, their systems offer unmatched temporal resolution designed to freeze cardiac motion without compromising image quality.
- Flagship line
- Aquilion ONE / INSIGHT Edition and PRISM Edition
Photon-counting or spectral: Photon-counting and 'PCCT Inspired' systems listed on its CT page; the Aquilion ONE line uses a 320-row (320 x 0.5 mm) detector for wide coverage
Why we picked it. Canon's Aquilion ONE line is built around a 320-row detector that covers an entire organ, such as the heart, in one rotation. That is what makes one-beat cardiac CT possible, and AiCE deep learning reconstruction is designed to keep images clear at lower dose.
More details, pros and cons
Pros
- 320-row wide detector for one-beat cardiac CT
- AiCE and PIQE deep learning reconstruction
- Aquilion Serve line for general use
Cons
- No refurbished program shown on its CT pages
- Pricing not published
- Photon-counting availability should be confirmed with sales
Skip it if: You need a vendor with a large certified refurbished catalog.
More about Canon Medical
Canon Medical Systems excels in combining industry-leading artificial intelligence reconstruction with expansive wide-bore designs. These systems are highly regarded for mitigating patient claustrophobia and speeding up clinical workflows in high-volume environments.
Best for software subscriptions and deep learning reconstruction: GE HealthCare
- Flagship line
- Revolution family
- Photon-counting or spectral
- PhotoNova Spectra photon-counting CT
- Refurbished program
- GoldSeal refurbished systems
Why we picked it. GE HealthCare pairs its Revolution scanners with TrueFidelity DL reconstruction and a Smart Subscription that the company calls the industry's first subscription service for CT software. GoldSeal offers a refurbished path from the same vendor.
More details, pros and cons
Pros
- Smart Subscription keeps software and apps updated
- TrueFidelity DL reconstruction
- GoldSeal refurbished systems
- Stroke and cardiac software such as FastStroke and CardIQ Suite
Cons
- Pricing not published
- Subscription adds a recurring cost to model
- Confirm photon-counting availability and clearance status in your market
Skip it if: You prefer a one-time purchase with no software subscription.
More about GE HealthCare
GE Healthcare provides an incredibly vast portfolio of imaging systems tailored to any clinical need. From budget-friendly refurbished models to ultra-premium cardiovascular machines, GE integrates deep learning tools to improve both image fidelity and scanner uptime.
- Flagship line
- Verida spectral CT
- Photon-counting or spectral
- Detector-based spectral imaging
- Refurbished program
- Circular Edition refurbished CT systems
Why we picked it. Philips builds spectral capability into the detector, so a single low-dose scan returns both anatomical and spectral data, according to the company. Circular Edition refurbished systems offer a lower-cost entry.
More details, pros and cons
Pros
- Detector-based spectral imaging
- AI-enabled CT Smart Workflow
- Circular Edition refurbished systems
- Remote services for uptime
Cons
- No photon-counting system listed on its US CT page
- Pricing not published
- Spectral workflow needs radiologist training to use well
Skip it if: Photon-counting is a must for your program today.
More about Philips Healthcare
Philips stands out by prioritizing patient safety with proprietary iterative reconstruction technologies that massively reduce radiation exposure. Their specialized spectral detector scanners deliver unparalleled always-on data, making them exceptional tools for complex oncology and neurology assessments.
How to choose a CT scanner for a clinic or hospital
- Start from your exam mix. Cardiac CT and stroke work reward wide detectors, fast rotation or photon-counting. Routine chest, abdomen and trauma work can often run well on a mid-range scanner.
- Check room, power and shielding. Flagship systems may need more floor space, power and cooling than the room you have. Ask for a site survey before you compare quotes.
- Compare dose and reconstruction tools. All four medical makers sell deep learning reconstruction (Siemens, Canon AiCE, GE TrueFidelity DL, Philips Spectral Precise Image). Ask for dose data on your own protocols.
- Weigh service before features. Uptime depends on how close the vendor’s field engineers are, parts stock and remote monitoring. Get the uptime guarantee in writing.
- Plan software upgrades. Ask what is included, what is licensed per seat, and whether upgrades are a subscription (GE Smart Subscription) or one-time purchases.
New vs refurbished CT scanners
Refurbished CT can cut the upfront cost and is a common choice for outpatient centers, urgent care and veterinary practices. Three of the four medical makers run their own programs: Siemens ecoline, GE GoldSeal and Philips Circular Edition. Buying refurbished from the original maker usually means factory parts, current software where supported and an OEM service contract.
| Question |
New |
OEM refurbished |
Third-party used |
| Latest features |
Yes |
Usually one generation back |
Varies |
| OEM service contract |
Yes |
Usually yes |
Not guaranteed |
| Tube life known |
New tube |
Ask for tube age and scan seconds |
Ask for records |
| Software support window |
Longest |
Confirm end of support date |
Often shorter |
Total cost of ownership
Manufacturers do not publish CT prices, and the purchase price is only part of the bill. Build a cost model for the full expected life of the system that includes:
- Purchase or lease price, by configuration
- Site preparation: shielding, power, HVAC, construction
- Service contract after warranty, and X-ray tube replacement terms
- Software licenses, upgrades or subscriptions
- Staff training and accreditation
- Downtime cost if uptime guarantees are missed
Get at least two vendor quotes on the same exam mix and ask each to price service for the full term.
Photon-counting, spectral and conventional CT explained
Conventional CT detectors convert X-rays to light, then to a signal. Spectral CT captures energy information, through a dual-layer detector (Philips) or dual-energy scanning, to separate materials such as iodine and calcium. Photon-counting CT counts individual X-ray photons and their energies directly, which makers say improves resolution and dose efficiency. Siemens sells three photon-counting models, and GE and Canon list photon-counting systems as well. Confirm FDA clearance and delivery dates for any system you consider.
Radiation safety and regulation
The FDA regulates CT scanners as medical devices and as radiation-emitting products. The agency notes that radiation exposure may cause a small increase in lifetime cancer risk, especially for children, and that the benefits outweigh the risks for medically necessary scans. Facilities are encouraged to follow the Image Gently and Image Wisely campaigns and use the lowest dose that gives a diagnostic image. Patients with questions about whether they need a CT scan should talk to their doctor.
Terms to know
- Photon-counting CT
- CT that counts individual X-ray photons and their energy for sharper, energy-resolved images.
- Spectral CT
- CT that captures energy information to tell materials such as iodine and calcium apart.
- Detector rows
- How many rows of detectors a scanner has, which sets how much anatomy it covers per rotation.
- Deep learning reconstruction
- AI-based image reconstruction that reduces noise so lower doses can be used.
- OEM refurbished
- A used system restored and resold by its original manufacturer.
- Total cost of ownership
- All costs over a system's life, including service, tubes, software and site work.
