November 30, 2008 DiagnosticImaging.com. Siemens unveils flagship low-dose, high-res CT By Greg Freiherr A new CT scanner built on Siemens' unique dual-source x-ray technology promises to dramatically reduce dose and eliminate motion artifact in the chest. Using two x-ray tubes and matching detectors, the Somatom Definition Flash, debuted at RSNA 2008, opens the door to routine scanning of the coronaries, according to the company. It requires only a fraction of the radiation dose of other systems now on the market and exposes patients to just a third of the dose they naturally encounter in a year from background sources. A new filter will purify x-ray beams at high and low energies to emit only the planned spectra, enhancing tissue characterization. The FDA-cleared system with a $2 million price tag will be installed first at leading institutions in Europe, then at ones in the U.S.
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