Transcription of Dual-Energy Computed Tomography
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Dual-Energy Computed Tomography
301 CTCED irected ReadingThis article is a Directed Reading. Your access to Directed Reading quizzes for continuing education credit is determined by your membership status and CE preference. RADIOLOGIC TECHNOLOGY, January/February 2015, Volume 86, Number 3 Described by researchers as one of the most exciting and promising developments in radiology in recent history, 1 Dual-Energy Computed Tomography (DECT) yields enhanced image con-trast resolution by simultaneously or nearly simultaneously acquiring scan data at 2 different x-ray tube energy lev-els (typically 80 kV and 140 kV). X-ray attenuation differences between these 2 energy spectra, measured by stan-dard detectors, are then used to define, differentiate, or quantif y the chemical composition of different tissues and ,3 Because of this capacity for material differentiation and improved detection of iodine at low energies, DECT imaging and postprocessing can yield complex visualizations that are rich in structural and functional detail, allowing isolation and quantification of tissues and disease processes in better detail than usually is possible with traditional single- energy CT imaging frequently without increased radia-tion doses to ,3,4 Because DECT can visualize more diagnostic information than many other medical imaging modalities, it also can reduce the need for multiple imaging exam
Dual-Energy Computed Tomography with tumors from those with noncancer causes.8,9 This imaging modality also allows detailed characterization of nontissue materials and mitigates imaging artifacts associated with metal devices.10 In recently published preliminary studies, …
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