Key Visual Siemens Healthineers Quantum Technology showirng the face of a middle-aged women, next to the abstract visualization of a photon-counting detector with its precise pulses

with Quantum Technology

CT redefined.

NAEOTOM Alpha with Quantum Technology is the first photon-counting CT in clinical use, awarded the iF Design Award 2022 and reddot award 2022.

NAEOTOM Alpha with Quantum Technology, the world's first photon-counting CT, is nothing less than the 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 in conventional CT scanners – for potentially scanning previously excluded patients and confident clinical decision making.


Abstract cross-section of the QuantaMax detector: X-ray photons that are converted to an electrical charge by the crystal semi-conductor.

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.


Impressive details with NAEOTOM Alpha

High resolution at low dose

With a slice thickness of 0.4 mm and an in-plane resolution of 0.24 mm in standard scan protocols, NAEOTOM Alpha provides an impressive level of detail at full dose efficiency.

  • High resolution in all standard native protocols
  • High resolution in all standard CT angiography protocols
  • High level of detail for evaluating fine structures in all anatomical areas

Clinical image courtesy of Erasmus Medical Center, Rotterdam, NL   

High resolution at standard dose

Ultra-high resolution at standard dose

With Quantum High Resolution scan mode, NAEOTOM Alpha delivers remarkable spatial resolution of 0.11 mm (in-plane) and a slice thickness of 0.2 mm.

  • Unmatched resolution both in-plane and cross-plane to evaluate fine lesions and anatomical structures (e.g., pulmonary nodules, cerebral vessels, osseous structures)

Clinical image courtesy of Erasmus Medical Center, Rotterdam, NL  

high resolution in cardiac imaging

High resolution in cardiac imaging

Using conventional CT, the limit for high-resolution images in cardiac CT is 0.6 mm slice thickness (without using comb filters). With NAEOTOM Alpha, this limit is pushed to 0.4 mm while retaining a remarkable temporal resolution of 66 ms and maintaining full dose efficiency – revealing impressive details in coronary vessels.

  • See small details in coronary CTA
  • Identify more details in coronary plaque evaluation 

Clinical image courtesy of Centre Cardio-thoracique, Monaco, MC    

Monoenergetic images independent of scan parameters with NAEOTOM Alpha

Monoenergetic images as default image type

For every scan, NAEOTOM Alpha produces monoenergetic images that are independent of scan parameters. This allows radiologists to tailor exams to the needs of the patient without compromising on consistency and comparability.

  • Analyze, evaluate, and compare scans using the ideal monoenergetic images for the clinical question at hand

Clinical image courtesy of Erasmus Medical Center, Rotterdam, NL   

Stable measurements with NAEOTOM Alpha

Stable Hounsfield values

Moving toward quantitative CT evaluation and radiomics, radiologists and referrers need to rely on the stability of their measurements. In contrast to conventional CT, photon-counting CT provides this stability.

  • Rely on quantitative and reproducible HU measurements, even in low-dose scans

Clinical image courtesy of Erasmus Medical Center, Rotterdam, NL

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 of imaging datasets. Identifying and quantifying relevant anatomies and abnormalities, they put findings into a diagnostic context – and allow 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.

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 1300 mA

    Temporal resolution

    Down to 66 ms


    70, 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 307 kg


    Up to 737 mm/s (with Turbo Flash)

    Are you interested in buying a new CT scanner?

    Please contact us for more details and about the price of NAEOTOM Alpha with Quantum Technology