Dec. 1, 2024 — Three years after launching its first photon-counting computed tomography (CT) scanner the Naeotom Alpha, Siemens Healthineers has introduced the Naeotom Alpha class, including a second dual source scanner, Naeotom Alpha.Pro1, as well as a source scanner with photon-counting technology, Naeotom Alpha.Prime1.
Since 2021, the Naeotom Alpha has been the only commercially available system with this technology available for clinical use, and more than a million patients have already been scanned worldwide. It will remain part of a new class of photon-counting CT scanners as the Naeotom Alpha.Peak.
Photon-counting CT enables the acquisition of more detailed images with anatomical and functional information by “counting” each individual X-ray photon that passes through patients. At lower radiation doses, clinicians can detect and evaluate small structures precisely and with fewer artifacts, maximizing the diagnostic information and accuracy for fast decision-making and optimized imaging workflows. Siemens Healthineers is currently investing $86 million to expand photon-counting detector production in Forchheim, Germany.
The Naeotom Alpha.Peak will be the high-end model of the new product series with the fast scan time of 737 mm/sec (millimeters per second. All Naeotom Alpha class systems will use the Quantum HD resolution feature to display anatomical details in high resolution at a slice thickness of 0.2 mm. Thus, without increasing the radiation dose, small abnormalities become visible.
The Naeotom Alpha.Pro combines the precision of photon-counting with the speed of dual source CT, resulting in scan times as fast as 491 mm/sec. Demanding examinations can be performed in, for example, pulmonology, with patients needing to hold their breath for less time; in cardiology, with scans at high heart rates without beta-blockers; and in pediatrics, where children can be scanned without sedation. This not only improves clinical workflows, but also the patient experience. Spectral performance is important for complex tasks such as the automatic analysis and evaluation of highly calcified coronary arteries and time-critical treatments, such as trauma or stroke. The Naeotom Alpha.Pro is therefore suitable for institutions catering to patients with these needs and as a centrally located high-performance scanner for complex cases at the core of hub-and-spoke networks, which can use other scanners in the periphery for routine exams.
The Naeotom Alpha.Prime is the world’s first single source photon-counting CT for use as a high-performance scanner for in-patient, ambulatory, and emergency room examinations in stand-alone institutions and big IDNs (Integrated Delivery Networks), or also in the periphery of hub-and-spoke networks. Precise diagnostic imaging with photon-counting CT as a new benchmark in future patient care will thus be available for the first time for facilities without specific needs for dual-source technology. Like all Naeotom Alpha class models, the Naeotom Alpha.Prime accelerates diagnostic and interventional processes with the support of artificial intelligence and automation: myExam Companion guides users through various step of the examination – from system and patient preparation to image acquisition and reconstruction, as well as evaluation and post-processing. This enables departments to quickly and easily achieve consistent results, regardless of patient group, procedure, or experience.
“With our Naeotom Alpha, we can confidently rule out obstructive coronary artery disease in a greater number of heart patients, particularly those with highly calcified coronaries, eliminating the need for invasive diagnostic procedures in the cath lab. This creates more efficient patient pathways and significantly reduces the time from diagnosis to the initiation of treatment,”2 said Pál Maurovich-Horvat, MD, chair of Radiology at Semmelweis University Hospital in Budapest. “Photon-counting computed tomography will replace conventional CT examinations in the medium term. We have now expanded our fleet with a single source photon-counting scanner in the emergency department to offer its benefits to our acute care patients, as well.”2
1. Naeotom Alpha.Peak, Naeotom Alpha.Pro and Naeotom Alpha.Prime are pending 510(k) clearance and are not yet commercially available in the United States and other countries. Their future availability cannot be guaranteed.
2. The statements by customers of Siemens Healthineers described herein are based on results that were achieved in the customer's unique setting. Because there is no “typical” hospital or laboratory and many variables exist, there can be no guarantee that other customers will achieve the same results.
March 23, 2026 
