The U.S. Food and Drug Administration (FDA) has cleared Siemens Healthineers' Naeotom Alpha class of photon-counting CT (PCCT) scanners.
The new product class includes Naeotom Alpha.Pro, a second dual-source CT scanner, and Naeotom Alpha.Prime, a single-source scanner with PCCT technology, Siemens said. The company's original Naeotom Alpha is now called Naeotom Alpha.Peak, and is the base system for the class; it delivers a scan speed of 737 mm/sec, according to the firm.
Naeotom Alpha Class of PCCT scanners. Image courtesy of Siemens Healthcare.
Naeotom Alpha.Pro combines photon-counting technology with the speed of dual-source, allowing for scan speeds of 491 mm/sec with the same 66 ms temporal resolution as Naeotom Alpha.Peak.
Naeotom Alpha.Prime features a scan speed of 345 mm/sec and consists of photon-counting technology in a single-source CT scanner, Siemens said.
![Axial images from unenhanced calcium score cardiac CT (left) and curved planar reformation images from CT angiography (right) show that higher long-term exposure to air pollution is associated with greater coronary artery calcium and more obstructive coronary artery disease (CAD). Top row: Images in a 68-year-old male patient with higher 10-year mean ambient air pollution exposure (7.9 μg/m3 for particulate matter measuring ≤2.5 μm in diameter [PM2.5] and 17.4 parts per billion [ppb] for NO2) with extensive CAD (coronary artery calcium score [CACS] >1,000 and obstructive CAD [≥70% diameter stenosis]). Bottom row: Images in a 57-year-old female patient with lower 10-year mean ambient air pollution exposure (6.3 μg/m3 for PM2.5 and 4.6 ppb for NO2) with no CAD (CACS = 0 and no obstructive stenosis).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/06/hanneman.r6SMLzkezo.png?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
