Interior of a CT scanner
Interior of a CT scanner

Image source/Copyright: Deutscher Zukunftspreis/Ansgar Pudenz

Photon counting

Major CT advancement receives FDA clearance

The U.S. Food and Drug Administration (FDA) cleared the first new major technological improvement for Computed Tomography (CT) imaging in nearly a decade.

“Computed tomography is an important medical imaging tool that can aid in diagnosing disease, trauma or abnormality; planning and guiding interventional or therapeutic procedures; and monitoring the effectiveness of certain therapies,” said Laurel Burk, Ph.D., assistant director of the Diagnostic X-ray Systems Team in the FDA’s Center for Devices and Radiological Health. “Today’s action represents the first major new technology for computed tomography imaging in nearly a decade and underscores the FDA’s efforts to encourage innovation in areas of scientific and diagnostic progress.”

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The device uses the emerging CT technology of photon-counting detectors which can measure each individual X-ray that passes through a patient's body, as opposed to current systems which use detectors that measure the total energy contained in many X-rays at once. By ‘counting’ each individual X-ray photon, more detailed information about the patient can be obtained and used to create images with less information that is not useful in the review and analysis.

The new diagnostic imaging device, called Siemens Naeotom Alpha, is designed to transform the information from X-ray photons that pass through a patient's body, and are received by a detector, into a detailed 3-dimensional image. The images delivered by the system can be used by a trained physician as an aid in diagnosis or can be used by trained staff as an aid in diagnosis, treatment preparation and radiation therapy planning.

The FDA reviewed the scanner through the 510(k) premarket clearance pathway. A 510(k) is a premarket submission made to the FDA to demonstrate that a new device is substantially equivalent to a legally marketed predicate device. The FDA granted clearance of the device to Siemens Medical Solutions Inc.


Source: U.S. Food and Drug Administration

01.10.2021

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