Photon-counting detectors advance CT technology
By Kaitlyn Wilkie
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Improving image quality and dose efficiency have always been top priorities in the development of new imaging systems to improve diagnostics and patient care. Photon-counting detectors (PCDs) are the newest major advancement for CT systems. These detectors have already been used for several years in nuclear imaging.

In September 2021, Siemens Healthineers received FDA approval for the NAEOTOM Alpha, the first photon-counting CT system cleared for the U.S. market. Neurologica received FDA approval for its photon-counting CT system, the OmniTom Elite with PCD, in March 2022. What makes these systems unique among other CT systems on the market is the PCD, which allows for spectral imaging. Conventional CT systems use third-generation digital radiography (DR) detectors. The PCD’s advantages are its ability to provide increased spatial resolution, decrease electronic noise, and reduce radiation exposure compared to DR detectors.

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