Photon-Counting CT Key Visual

with Quantum Technology

The world’s first photon-counting CT

NAEOTOM Alpha VA50 Product Image

NAEOTOM Alpha® with Quantum Technology, the world's first photon-counting CT, is nothing less than the total reinvention of computed tomography.

Based on the revolutionary direct signal conversion of its QuantaMax detector, NAEOTOM Alpha offers high-resolution images at minimal dose, spectral information in every scan, and improved contrast at lower noise.

Benefit from a range of clinical options and breakthrough consistency never seen before – for confident clinical decision-making and the potential to scan previously excluded patients.

Experience a defining moment in computed tomography.

What is photon-counting CT?  

NAEOTOM Alpha Photon-Counting CT Detector

With photon-counting CT, we have developed a radically new technology for clinical routine. At its core is a new kind of detector that is substantially different from a standard energy-integrating detector.

These photon-counting detectors have the potential to overcome the limitations of current CT detectors, by providing CT data at high spatial resolution, without electronic noise, and with inherent spectral information.


Providing more answers to more patients

Hear from Prof. Dr. Hatem Alkadhi and Prof. Dr. Robert Manka from University Hospital Zürich how they can provide more answers to more patients with NAEOTOM Alpha by achieving the highest resolution in cardiac CT that they have experienced so far.

Better evaluation of small structures in neurological imaging

Hear from Prof. Aad van der Lugt, Dr. Robert Jan Pauw and Dr. Anke van der Eerden how they achieve superior image quality, improved noise and sharpness without changing the dose using NAEOTOM Alpha and its ultra-high resolution with 0.2mm slice thickness.

See fine details without compromises

NAEOTOM Alpha redefines how high resolution and inherent spectral information can be utilized for multiple myeloma patients to detect small osteolytic bone lesions and precisely assess their status. Discover how Prof. Konstantin Nikolaou and Prof. Claudia Lengerke benefit from a new level of detail for their clinical decisions, while keeping dose to a minimum.

Changing patient pathways

Discover how NAEOTOM Alpha helps Prof. Dr. Hatem Alkadhi and Prof. Dr. Robert Manka from University Hospital Zürich to change patient pathways. Now they can confidently perform cardiac CT angiography even in patients with high calcium burden and send less patients to invasive procedure.

Expanding patient reach for the treatment of acute ischemic stroke

Up to 40% of the acute ischemic stroke cases are due to medium and small level occlusions and it is very challenging to visualize and detect those occlusions. Listen to Prof. Aad van der Lugt, Dr. Anke van der Eerden and Dr. Pieter Jan van Doormaal how they optimize the visibility of medium- and small-sized arteries in the brain with NAEOTOM Alpha, and potentially better diagnose occlusions.

Redefining CT in Cardiology

Watch what Joseph Schoepf, MD, Professor of Radiology, Medicine, and Pediatrics, and Richard Bayer, MD, Cardiologist and Association Professor of Medicine and Radiology, both at the Medical University of South Carolina (MUSC), have to say about the range of patients that can be addressed with the NAEOTOM Alpha.

Spectral information at the highest temporal resolution

Listen to Prof. Dr. Hatem Alkadhi and Prof. Dr. Robert Manka from University Hospital Zürich how NAEOTOM Alpha provides spectral information at the highest temporal resolution for the evaluation of myocardium in addition to the coronary vessels.

Provide meaningful answers to all oncological cases

Learn how Prof. Claudia Lengerke and Prof. Konstantin Nikolaou improve oncologic body imaging for different patient groups and without any compromise on scan speed, spatial resolution or spectral information. NAEOTOM Alpha provides all required CT information in one scan for a powerful tumor lesion depiction and detection of small lesions.

Providing non-invasive answers – clearly and accurately

Discover how Prof. Joe Schoepf and Dr. Richard Bayer benefit from getting more answers with each scan of NAEOTOM Alpha.

Precision and consistency by bringing spectral information into clinical routine

Learn how Prof. Claudia Lengerke and Prof. Konstantin Nikolaou bring spectral information into their routine workup for iron quantification to diagnose relevant complications in oncologic patients.

Diagnostic consistency in pulmonology throughout the whole patient journey

See how Prof. Martine Rémy-Jardin and Prof. Launay talk about the advantages of using NAEOTOM Alpha for exquisite delineation of lung fibrosis even in obese patients.

myExam Companion –  our new philosophy to operate modalities

myExam Companion

Using the new possibilities of digitalization, myExam Companion guides operators through diagnostic procedures, so that they can interact easily and naturally with both patient and technology.

GO technologies – for unparalleled flexibility and mobility in CT routines

GO technologies

Accessible via tablet or workstation, GO technologies are a set of technologies that standardize and simplify all departmental processes – from patient setup to image distribution, archiving, and reading.

AI-Rad Companion – our family of AI-powered, augmented workflow solutions

AI-Rad Companion

AI-powered algorithms provide automatic post-processing and quantify relevant anatomies and abnormalities, putting findings into a diagnostic context for a fast and accurate diagnosis.


NAEOTOM Alpha offers an easy and streamlined way to get quantitative information in addition to morphology. By matching the appropriate protocols to patients and by combining all necessary acquisitions into a single scan, NAEOTOM Alpha enables smart navigation through the diagnostic pathway.

NAEOTOM Alpha Pulmonology Spectral High-Res Lung CTA

Spectral high-res lung CTA

0.4 mm slice thickness
Cinematic VRT
100 keV monoenergetic recon

NAEOTOM Alpha Pulmonology Spectral High-Res Lung CTA

Spectral high-res lung CTA

0.4 mm slice thickness
100 keV monoenergetic recon
CTDIvol: 3.57 mGy

Technical Details

    X-ray tubes

    2 x Vectron X-ray tubes


    2 x QuantaMax photon-counting CT detectors

    Number of acquired slices

    2 x 144 slices


    Up to 1,300 mA

    Temporal resolution

    Down to 66 ms


    702 ,90, 120, 140 kV
    Sn100, Sn140 kV


    144 x 0.4 mm
    120 x 0.2 mm (UHR)

    Spatial resolution

    0.11 mm (in-plane) in UHR mode


    2 x 120 kW

    Table load

    Up to 676 lbs (307 kg)


    Up to 737 mm/s (with Turbo Flash)

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