Dual-Energy CT: Spectrum of Thoracic abnormalities
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The concept of the use of multiple energy levels in computed tomography (CT) was first initiated 40 years ago, but a lack of appropriate technology did not allow clinical implementation.Dual-energy CT refers to the near-simultaneous acquisition of CT images at two x-ray energy levels. Concerns over increased radiation dose with dual-energy CT were an impediment to the adoption of this technique, but the use of modern scanners, especially those that with tube current modulation, have resolved this concern. Use of dual-energy CT in the chest can help with the evaluation of several chest abnormalities, such as pulmonary embolism, other vascular abnormalities, thoracic malignancies, interstitial lung disease, and mediastinal abnormalities.

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