Optimal Monochromatic Energy Levels in Spectral CT Pulmonary Angiography for the Evaluation of Pulmonary Embolism

Abstract

The optimal energy level for detecting pulmonary embolism using dual-energy spectral CT pulmonary angiography was 65-70 keV. Virtual monochromatic spectral images at approximately 65-70 keV yielded the lowest image noise, high CNR and highest diagnostic confidence for the detection of pulmonary embolism.